The expected number of patients experiencing flulike symptoms is 17.33.
Based on the information given, researchers selected 825 patients at random who take a certain widely-used prescription drug daily. In a clinical trial, 22 out of the 825 patients complained of flulike symptoms. The researchers' hypothesis is that more than 2.1% of this drug's users experience flulike symptoms as a side effect.
To test this hypothesis, we can use a one-tailed hypothesis test with a significance level of 0.01. The null hypothesis (H0) is that the proportion of patients experiencing flulike symptoms is equal to or less than 2.1%. The alternative hypothesis (Ha) is that the proportion of patients experiencing flulike symptoms is greater than 2.1%.
To calculate the test statistic, we first need to find the expected number of patients experiencing flulike symptoms under the null hypothesis. This is equal to the sample size (825) multiplied by the proportion of patients experiencing flulike symptoms under the null hypothesis (0.021). So, the expected number of patients experiencing flulike symptoms is 17.33.
Next, we can calculate the test statistic using the formula:
z = (x - μ) / σ
where x is the observed number of patients experiencing flulike symptoms (22), μ is the expected number of patients experiencing flulike symptoms under the null hypothesis (17.33), and σ is the standard deviation of the sampling distribution, which can be approximated by:
σ = sqrt[(p * (1 - p)) / n]
where p is the proportion of patients experiencing flulike symptoms under the null hypothesis (0.021) and n is the sample size (825).
Plugging in the values, we get:
z = (22 - 17.33) / sqrt[(0.021 * (1 - 0.021)) / 825] = 2.17
Looking up the critical value for a one-tailed test with a significance level of 0.01, we find that it is 2.33. Since our test statistic (2.17) is less than the critical value (2.33), we fail to reject the null hypothesis.
Therefore, we do not have sufficient evidence to conclude that more than 2.1% of this drug's users experience flulike symptoms as a side effect at the 0.01 level of significance.
In the given scenario, researchers selected 825 patients who take a certain prescription drug daily. Out of these, 22 patients experienced flulike symptoms. The hypothesis being tested is whether more than 2.1% of this drug's users experience flulike symptoms as a side effect at the α=0.01 level of significance. Since np₀(1-p₀) = 17.0 > 10, the sample size is less than 5% of the population size, and the patients were selected randomly, all requirements for testing the hypothesis are satisfied.
Learn more about null hypothesis at: brainly.com/question/28920252
#SPJ11
what is the diameter of a sphere with a volume of 6329 ft 3 , 6329 ft 3 , to the nearest tenth of a foot?
Therefore, the diameter of the sphere is approximately 20.2 feet when the volume is 6329 cubic feet.
The formula for the volume of a sphere is V = (4/3)πr³, where r is the radius of the sphere. To find the diameter, we need to find the radius first.
(4/3)πr³ = 632
r³ = (3/4)(6329/π)
r = ∛(3(6329/4π))
r ≈ 10.1 feet (rounded to one decimal place)
The diameter of the sphere is twice the radius, so:
d = 2r
≈ 20.2 feet (rounded to one decimal place)
To know more about volume,
https://brainly.com/question/28338582
#SPJ11
We begin our study of regression with what is called simple linear regression (slr). the most basic statistical model says that for an observation xi (called the independent variable), the response variable yi is where which of the following data sets do you think will follow this model?
To determine which data set will follow the simple linear regression (SLR) model, we need to look for a relationship between the independent variable (xi) and the response variable (yi).
The SLR model assumes that there is a linear relationship between the two variables, meaning that as the value of xi increases or decreases, the value of yi also increases or decreases in a straight line.
Therefore, the data set that shows a clear linear relationship between xi and yi is most likely to follow the SLR model. We can use a scatter plot to visualize the relationship between the two variables and determine if it is linear.
If the scatter plot shows a roughly straight line relationship between xi and yi, then the data set is likely to follow the SLR model. On the other hand, if the scatter plot shows a curved or non-linear relationship between xi and yi, then the data set is not likely to follow the SLR model.
So, in summary, the data set that shows a clear linear relationship between xi and yi is the one that is most likely to follow the simple linear regression (SLR) model.
Simple linear regression (SLR), it is important to note that SLR is a method used to model the relationship between a response variable (yi) and an independent variable (observation xi). In this model, the response variable yi is a linear function of the independent variable xi.
Since you have not provided specific data sets to choose from, I am unable to directly indicate which data set will follow this model. However, to identify a data set that would likely follow the simple linear regression model, look for one that exhibits a linear relationship between the independent variable (xi) and the response variable (yi). In such a data set, you would observe a pattern where, as xi increases or decreases, yi would also consistently increase or decrease in a relatively straight line.
To summarize, to determine if a data set follows the simple linear regression model, check if it exhibits a linear relationship between the independent variable (observation xi) and the response variable (yi).
Visit here to learn more about simple linear regression (SLR) :
brainly.com/question/29665935
#SPJ11
The automated data collection system for a manufacturing process will record data for 25,000 parts per day. Assume that, when stable, a certain process will operate with a nonconformance rate of 37.6 NCPPM (nonconforming parts per million). If the nonconformance rate per day is to be monitored using a control chart, what type of chart would be used? Choose a P, U, or X-Bar/S Charts, and explain in a few words.
Based on the given scenario, an X-Bar/S chart would be the most appropriate type of control chart to use for monitoring the nonconformance rate per day. This is because the X-Bar/S chart is designed to monitor the process mean and variability over time, which is important for detecting any shifts or trends in the nonconformance rate.
The automated data collection system will record data for 25,000 parts per day, which provides enough data points to construct an X-Bar/S chart with sufficient sample size. By analyzing the chart, quality control personnel can quickly identify any deviations from the expected nonconformance rate and take corrective action as necessary to maintain the stability and quality of the manufacturing process.
A U chart would be used for this scenario. The automated data collection system records data for a large number of parts (25,000) daily. The nonconformance rate is given in NCPPM (nonconforming parts per million), which represents a count of nonconforming parts in a sample. U charts are appropriate for monitoring the average number of nonconformities per unit in a process, making it the most suitable choice among P, U, and X-Bar/S Charts for this case.
Learn more about data collection here:-brainly.com/question/21605027
#SPJ11
A rectangle's perimeter and its area have
the same numerical value. The length of the
rectangle is 6 centimeters.
Write an equation that can be used to find x, the
width of the rectangle in centimeters.
Answer:
A rectangle's perimeter and its area have
the same numerical value. The length of the
rectangle is 6 centimeters.
Write an equation that can be used to find x, the
width of the rectangle in centimete
Step-by-step explanation:
Answer :
According to the question it's given that,
A rectangle's perimeter and its area have the same numerical value. The length of the rectangle is 6 centimeters.
Required Formulas,
[tex]:\implies[/tex] perimeter of rectangle is 2(l+ b)
[tex]:\implies[/tex] Area of rectangle = l × b
Also, Length of rectangle is 6 cm.
Perimeter of rectangle
[tex]:\implies[/tex] 2(6 + x)
[tex]:\implies[/tex] 12 + 2x
Area of rectangle
[tex]:\implies[/tex] l × b
[tex]:\implies[/tex] 6 × x
[tex]:\implies[/tex] 6x
Now, A rectangle's perimeter and its area have the same numerical value.
Perimeter of rectangle = Area of rectangle
[tex]:\implies[/tex] 12 + 2x = 6x (required equation)
Therefore this is the required equation to find the width of the rectangle.
At the beginning of the year, a company estimates total overhead costs of $1,309,620. The company applies overhead using machine hours and
estimates that it will use 2,990 machine hours during the year. What amount of overhead should be applied to a job that uses 30 machine hours that
year?
If at the beginning of the year, a company estimates total overhead costs of $1,309,620. The amount of overhead should be applied to a job that uses 30 machine hours that year is: 13,140.
What amount of overhead should be applied to a job?Overhead rate per machine hour = Total estimated overhead costs / Estimated number of machine hour
Overhead rate per machine hour = $1,309,620 / 2,990
Overhead rate per machine hour = $438 per machine hour
Overhead applied to job = Overhead rate per machine hour x Number of machine hours used
Overhead applied to job = $438 x 30
Overhead applied to job = $13,140
Therefore, the amount of overhead is $13,140.
Learn more about overhead here:https://brainly.com/question/13037939
#SPJ1
a card game using 36 unique cards: four suits (diamonds, hearts, clubs, and spades) with cards numbered from 1 to 9 in each suit. a hand is a collection of 9 cards, which can be sorted however the player chooses. how many 9 card hands, out of the total set of 36 possible cards, can be made?
There are 9,075,135,300 possible 9 card hands that can be made from a set of 36 unique cards.
This is a combination problem, where we want to select 9 cards from a set of 36 cards.
The order of the cards in the hand does not matter, so we need to use the formula for combinations:
n C r = n! / (r! * (n-r)!)
where n is the total number of items, r is the number we want to select, and ! denotes the factorial function.
In this case, we have n = 36 and r = 9. So, the number of 9 card hands we can make is:
36 C 9 = 36! / (9! * (36-9)!)
= (36 x 35 x 34 x 33 x 32 x 31 x 30 x 29 x 28) / (9 x 8 x 7 x 6 x 5 x 4 x 3 x 2 x 1)
= 9,075,135,300
Therefore, there are 9,075,135,300 possible 9 card hands that can be made from a set of 36 unique cards.
To learn more about unique visit:
https://brainly.com/question/29995229
#SPJ11
Can someone help with this geometry question number 5 and 6
The length of arc AB using the measure circle are 5) 6.28 feet and 6) 18.84 feet.
How to find length?To find the length of arc AB with a measure of 80°, use the formula:
length of arc AB = (measure of arc AB / 360°) x circumference of circle
The diameter of the circle is given as 9 feet, so the radius is 4.5 feet. The circumference of the circle is:
circumference = 2 x π x radius
circumference = 2 x 3.14 x 4.5
circumference = 28.26 feet
Using the formula:
length of arc AB = (80° / 360°) x 28.26
length of arc AB = 0.2222 x 28.26
length of arc AB = 6.28 feet
Rounding to the nearest hundredth:
length of arc AB ≈ 6.28 feet
To find the length of arc AB with a measure of 240°, use the same formula as above:
length of arc AB = (measure of arc AB / 360°) x circumference of circle
Using the same values for the diameter and radius of the circle:
length of arc AB = (240° / 360°) x 28.26
length of arc AB = 0.6667 x 28.26
length of arc AB = 18.84 feet
Rounding to the nearest hundredth:
length of arc AB ≈ 18.84 feet
Find out more on length here: https://brainly.com/question/28322552
#SPJ1
Recall in class we showed the derivation of logistic regression from Naive Bayes as- sumptions. At that time, we assumed the variance o2 of class-conditional probability distri- bution is independent of class index k and feature index j. Now we generalize it by removing the assumption of ožk being independent of j and k. Namely, ok of the class-conditional probability distribution p(x;\y = k) now depend on both indices. jk - Is the new form of p(x;\y = k) still implying the same logistic regression formula p(y|X)? If not, write down the new form of logistic regression.
In the original derivation of logistic regression from Naive Bayes assumptions, we assumed that the variance σ^2 of a class-conditional probability distribution is independent of class index k and feature index j. Now, by generalizing and allowing σ^2_jk to depend on both indices, the class-conditional probability distribution p(x|y=k) is now affected by this change.
This new assumption affects the logistic regression formula p(y|X) because it no longer relies on the original independence assumption. Consequently, the logistic regression model will need to account for the new variances σ^2_jk, which depend on both class index k and feature index j.
The new form of logistic regression will likely be different from the original formula, as it must now accommodate the modified variances in class-conditional probability distributions. Unfortunately, without more information, it is not possible to provide the exact new form of logistic regression here. However, it's important to note that this new form should consider the dependency of σ^2_jk on both indices j and k.
Learn more about logistic here:
https://brainly.com/question/25380728
#SPJ11
A quality-control inspector accepts shipments whenever a sample of size 5 contains no defectives, and she rejects otherwise. a) Determine the probability that she will accept a poor shipment of 50 items in which 20% are defective. b) Determine the probability that she will reject a good shipment of 100 items in which only 2% are defective.
The probability of rejecting a good shipment of 100 items with 2% defective rate is 0.0913.
For part a, we can use the binomial distribution formula to calculate the probability of getting no defectives in a sample of 5 items, given that 20% of the 50 items are defective:
P(accepting a poor shipment) = P(sample of 5 contains no defectives)
= C(5,0) * (0.2)^0 * (0.8)^5
= 0.3277
So the probability of accepting a poor shipment of 50 items with 20% defective rate is 0.3277.
For part b, we can again use the binomial distribution formula to calculate the probability of getting at least one defective in a sample of 5 items, given that only 2% of the 100 items are defective:
P(rejecting a good shipment) = P(sample of 5 contains at least one defective)
= 1 - P(sample of 5 contains no defectives)
= 1 - C(5,0) * (0.02)^0 * (0.98)^5
= 0.0913
Know more about probability here:
https://brainly.com/question/30034780
#SPJ11
if no digit may be used more than once, how many 5-digit numbers can be formed using only the digits 3, 8, 1, 2, 5, and 7? (1 point)
To solve this problem, we need to use the formula for permutations, which is nPr = n! / (n - r)!, where n is the total number of objects and r is the number of objects we are choosing. In this case, we are choosing 5 digits from a set of 6 digits (since we can't repeat any digit), so we have:
6P5 = 6! / (6 - 5)! = 6 x 5 x 4 x 3 x 2 = 720
Therefore, there are 720 5-digit numbers that can be formed using only the digits 3, 8, 1, 2, 5, and 7, where no digit is used more than once.
To form a 5-digit number using the digits 3, 8, 1, 2, 5, and 7 without repetition, follow these steps:
1. Choose a digit for the first position: You have 6 options (3, 8, 1, 2, 5, or 7).
2. Choose a digit for the second position: You now have 5 remaining options (since you cannot repeat the digit chosen in step 1).
3. Choose a digit for the third position: You have 4 remaining options (excluding the digits chosen in steps 1 and 2).
4. Choose a digit for the fourth position: You have 3 remaining options (excluding the digits chosen in steps 1, 2, and 3).
5. Choose a digit for the fifth position: You have 2 remaining options (excluding the digits chosen in steps 1, 2, 3, and 4).
Now, multiply the number of options for each position: 6 × 5 × 4 × 3 × 2 = 720
So, there are 720 different 5-digit numbers that can be formed using the digits 3, 8, 1, 2, 5, and 7 without repetition.
To learn more about permutations : brainly.com/question/30649574
#SPJ11
PLS HELP WITH NUMBER 3!!!
The number of calories that Taylor would have to burn at her next workout to have the same average as Macy is given as follows:
312.4 calories.
How to calculate the mean of a data-set?The mean of a data-set is given by the sum of all observations in the data-set divided by the number of observations, which is also called the cardinality of the data-set.
Hence the mean amount for each person is given as follow:
Taylor: (450 + 375 + 426 + 454 + 505)/5 = 442 calories.Macy: (520 + 335 + 358 + 400 + 489)/5 = 420.4 calories.Hence the number of calories needed in the sixth workout for Taylor is obtained considering a mean of 420.4 as follows:
420.4 = (442 x 5 + n)/6
2210 + n = 2522.4
n = 2522.4 - 2210
n = 312.4 calories.
More can be learned about the mean of a data-set at https://brainly.com/question/1136789
#SPJ1
If cosx=square root of 3/2 , find cos (x+pi)
The value of cos (x + pi) is -✓3/2, based on the stated information and known trigonometric values.
As per the known fact, the value of x wil be 30° as it is the specific value whose cosine or cos is ✓3/2. Now, we also know that π represents 180°. Also, the formula for cos (a + b) is cos A cos B - sin A sin B.
So, cos (x + pi) will be -
cos x cos pi - sin x sin pi
Keeping the values and solving -
cos (x + pi) = cos 30 cos 180 - sin 30 sin 180
cos (x + pi) = (✓3/2 × -1) - (1/2 × 0)
cos (x + pi) = -✓3/2
Hence, the value of cos (x + pi) is -✓3/2.
Learn more about cosine -
https://brainly.com/question/24305408
#SPJ4
9. At a clothing store, a pair of jeans costs $40. Using a coupon, Shanice is
able to pay $10 less than the original price.
Determine the percentage off the original price the coupon represents.
Show your work in the space provided. Then, complete the statement.
Work
The coupon gives Shanice
off of the original price.
_%
The coupon give Shanice 75 percent off the original price of the pair of jeans.
How to find the percentage of the original price of a goods?At a clothing store, a pair of jeans costs $40. Using a coupon, Shanice is
able to pay $10 less than the original price. Therefore, the percentage off the original price the coupon represents can be calculated as follows:
Therefore,
Price Shanice bought the jeans = 40 - 10 = 30 dollars
Hence,
let
x = percentage off the original price
Therefore,
x / 100 × 40 = 30
40x / 100 = 30
cross multiply
3000 = 40x
divide both sides by 40
x = 3000 / 40
x = 75%
Therefore, the coupon gives Shanice 75% off of the original price.
learn more on percentage here: https://brainly.com/question/29992861
#SPJ1
Which is a prime number? 10, 12, 17
Answer: 17 is a prime number.
Explanation:
17 is a prime number because it is a natural number greater than 1 that has no positive divisors other than 1 and itself. In other words, 17 can only be divided evenly by 1 and 17. It is not possible to find any other whole number that can divide into 17 without a remainder. This property is what makes 17 a prime number.
Answer:
17
Step-by-step explanation:
17 is the only # in the set that is only divisible by 1 and itself, make it prime.
On the other hand,
10 is divisible by:
1, 10
2, 5.
12 is divisible by:
1, 12
2, 6
3, 4
So only 17 is prime.
A family has a unique pattern in their tile flooring on the patio. An image of one of the tiles is shown.
A quadrilateral with a line segment drawn from the bottom vertex and perpendicular to the top that is 7 centimeters. The right vertical side is labeled 3 centimeters. The portion of the top from the left vertex to the perpendicular segment is 4 centimeters. There is a horizontal segment from the left side that intersects the perpendicular vertical line segment and is labeled 6 centimeters.
What is the area of the tile shown?
58 cm2
44 cm2
74 cm2
70 cm2
Therefore, the area of the tile shown is approximately 58 cm^2, which is closest to the first option, 58 cm^2.
How to solve for the areaWe know that BC = 3 cm and CD = 7 cm. We also know that AD = 4 cm and BD = 6 cm. To find the length of AB, we can use the Pythagorean theorem:
AB^2 = Ad² + BD²
AB^2 = 4² + 6²
AB² = 52
AB = √(52) =
2 * √(13) cm
Area = (1/2) x (sum of parallel sides) x (distanc)
In this case, the sum of the parallel sides is AB + BC = 2sqrt(13) + 3 cm, and the distance between them is CD = 7 cm. So:
Area = (1/2) x (2* √(13) + 3) x 7
Area = (√(52) + 3/2) x 7
Area ≈ 58 cm²
Therefore, the area of the tile shown is approximately 58 cm^2, which is closest to the first option, 58 cm^2.
Read more on area here:https://brainly.com/question/25292087
#SPJ1
3 -2 - 4 Let y = . u2 = Find the distance from y to the plane in R3 spanned by u, and uz. -8 5 -5 1 2. The distance is a (Type an exact answer, using radicals as needed.)
To find the distance from y to the plane in R3 spanned by u, we first need to find the projection of y onto u.
We can do this using the formula: proj_u(y) = ((y ⋅ u) / ||u||^2) * u
where ⋅ represents the dot product, and ||u|| is the length of u. Plugging in the values given,
we get: proj_u(y) = ((3(-8) - 2(5) - 4(-5)) / (1^2 + 2^2 + 2^2)) * <1, 2, 2>
= (-44 / 9) * <1, 2, 2>
= <-44/9, -88/9, -88/9>
Next, we can find the distance from y to the plane by subtracting the projection from y, and taking the length of the resulting vector.
That is: distance from y to plane = ||y - proj_u(y)||
= ||<0, 3, -4> - <-44/9, -88/9, -88/9>||
= ||<44/9, 35/9, -4/9>||
= sqrt((44/9)^2 + (35/9)^2 + (-4/9)^2)
= sqrt(2029/81)
Therefore, the distance from y to the plane in R3 spanned by u is sqrt(2029/81), or approximately 4.208 units.
To know more about length click here
brainly.com/question/30625256
#SPJ11
while working as a reace driver, jalen nedded to replace the trie on his car, tries are sold by the measurment around the outside of the tire. he measures the dimeter of the tire be 24 inches. what size tire does he need to by ( round to the nearest half inch)?
Jalen need to buy a tire of 69.08 m.
Given that, the tire diameter is 24 inches, we need to calculate the size tire does Jalen need to buy,
To find the same, we will calculate the circumference of the tire,
Circumference = π × diameter
= 3.14 × 22
= 69.08
Hence, Jalen need to buy a tire of 69.08 m.
Learn more about Circumference click;
https://brainly.com/question/28757341
#SPJ1
Write the inverse of each function. 4. f(x)=-4/3x
Answer:
-4/3 = -1 1/3 (In decimal form: -1.3)
Step-by-step explanation:
f(x) = -4/3x
(The derivative of ax^n is nax^n-1.)
-4/3x^1-1
(Subtract 1 from 1.)
-4/3x^0
(For any term t except 0, t^0 = 1.)
-4/3
set up the partial fraction decomposition for each rational expression. do not try to find values for a, b, c, etc. the independent variable is x foreach expression. all other letters represent constants.
To set up a partial fraction decomposition for a rational expression, we want to express it as a sum of simpler fractions, with each denominator being a linear factor (i.e. a factor of the form ax + b, where a and b are constants). The general form of a partial fraction decomposition is:
f(x) = A/(ax + b) + B/(cx + d) + ...
where A, B, etc. are constants that we'll need to solve for.
Note that we're not trying to find specific values for A, B, etc. in this question - we're just setting up the decomposition.
So, for each rational expression, we'll need to factor the denominator into linear factors (if it's not already in that form). Then we'll set up the partial fraction decomposition using the formula above. Here are a few examples:
Example 1: (x^2 + 5x + 6)/(x^2 + 4x + 3)
First, let's factor the denominator: x^2 + 4x + 3 = (x + 1)(x + 3). So we can write:
(x^2 + 5x + 6)/(x^2 + 4x + 3) = A/(x + 1) + B/(x + 3)
Note that we have two linear factors in the denominator, so we need two terms in the partial fraction decomposition. We don't know what A and B are yet - we'll need to solve for them.
Example 2: (2x + 5)/(x^2 - 4)
The denominator here is not yet in factored form, so we'll need to factor it first: x^2 - 4 = (x + 2)(x - 2). Then we can write:
(2x + 5)/(x^2 - 4) = A/(x + 2) + B/(x - 2)
Again, we have two linear factors in the denominator, so we need two terms in the partial fraction decomposition.
Example 3: (4x^2 - 2x + 1)/(x^3 + x)
The denominator here is not in factored form, so we'll need to factor it: x^3 + x = x(x^2 + 1). Then we can write:
(4x^2 - 2x + 1)/(x^3 + x) = A/x + B/(x^2 + 1)
In this case, we have one linear factor (x) and one quadratic factor (x^2 + 1), so we need two terms in the partial fraction decomposition.
Learn more about decomposition here:
https://brainly.com/question/8009068
#SPJ11
at the 0.05 significance level, for a p-value of 0.0005 you should a. find in favor of the null hypothesis, fail to reject h0.b. find in favor of the alternative hypothesis, reject h0
At the 0.05 significance level, for a p-value of 0.0005, you should find in favor of the alternative hypothesis and reject the null hypothesis, i.e., Option B is the correct answer.
The significance level, also known as alpha, is the threshold used to determine whether to reject or fail to reject the null hypothesis. In this case, the significance level is 0.05, which means that there is a 5% chance of rejecting the null hypothesis when it is true.
The p-value, on the other hand, is the probability of obtaining a test statistic as extreme or more extreme than the observed value, assuming the null hypothesis is true. A small p-value indicates strong evidence against the null hypothesis, while a large p-value suggests weak evidence against it.
In this scenario, the p-value of 0.0005 is smaller than the significance level of 0.05, indicating strong evidence against the null hypothesis. As such, you should find in favor of the alternative hypothesis and reject the null hypothesis. This means that there is significant evidence to support the alternative hypothesis and suggest that the observed results are not due to chance.
To learn more about the Null hypothesis, visit:
https://brainly.com/question/28042334
#SPJ11
Find four rational numbers between-1/3 and-2/3
Answer:
Step-by-step explanation:
-1/3 and - 2/3
can be written as
-11/33 and -22/33
so 4 rational numbers between these are:
-13/33, -14/33, -17/33 and - 19/33.
A random sample of 50 purchases from a particular pharmacy was taken. The type of item purchased was recorded, and a table of the data was created.
Item Purchased Health & Medicine Beauty Household Grocery
Number of Purchases 10 18 15 7
Which graphical representation would be best to display the data?
Box plot
Line plot
Histogram
Stem-and-leaf plot
A bar chart or box plot would be the most appropriate graphical representation to display the given data. The correct option is A.
The best graphical representation to display the given data would be a bar chart, also known as a bar graph.
A bar chart is a graph that represents categorical data with rectangular bars, where the height or length of each bar corresponds to the frequency or relative frequency of the category. In this case, the categories are the types of items purchased (Health & Medicine, Beauty, Household, and Grocery), and the frequency is the number of purchases in each category.
A box plot would not be appropriate for this data because it is not numerical data and cannot be separated into quartiles or percentiles. A line plot would also not be appropriate because it is used to display individual data points rather than grouped data.
A histogram would not be appropriate because it is used to display continuous numerical data rather than categorical data. A stem-and-leaf plot would not be appropriate because it is also used to display numerical data.
Therefore, a bar chart would be the most appropriate graphical representation to display the given data.
To know more about bar graphs follow
https://brainly.com/question/30923518
#SPJ1
how many grams of CaC2 are needed to react completely with 490 moles of H2O
It takes 15,699.5 grams of CaC2 to thoroughly react with 490 moles of water.
The balanced chemical equation for the reaction of calcium carbide (CaC₂) with water (H₂O) is:
CaC₂ + 2H₂O → Ca(OH)₂ + C₂H₂
From the equation, we can see that 1 mole of CaC₂ reacts with 2 moles of H₂O. Therefore, to find the number of moles of CaC₂ needed to react completely with 490 moles of H₂O, we divide 490 by 2:
Number of moles of CaC₂ = 490 moles of H₂O / 2 = 245 moles of CaC₂
Now, we need to use the molar mass of CaC₂ to convert the number of moles to grams:
Molar mass of CaC2 = 64.10 g/mol
Mass of CaC₂ = Number of moles of CaC₂ x Molar mass of CaC₂
= 245 moles x 64.10 g/mol
= 15,699.5 g
Therefore, 15,699.5 grams of CaC₂ are needed to react completely with 490 moles of H₂O.
To know more about chemical reactions follow
https://brainly.com/question/30618195
#SPJ1
A system of equations consisting of a circle and a line is graphed. Which sttements about the number of possible solutions are correct? Check all that apply.
The requried statements about the number of possible solutions are shown below.
The correct statements are:
A circle and a line can intersect at one point, so the system can have one solution.A circle and a line can intersect twice, so the system can have two solutions.A circle and a line do not have to intersect, so the system can have no solution.Learn more about the system of equations here:
https://brainly.com/question/12895249
#SPJ1
Which of the following is true regarding p-values associated with the estimated coefficients in a linear regression model?
a. The larger the p-value, the higher the probability that the variable is statistically significant. b. The larger the p-value, the more confident we are that we should reject the null hypothesis that the population coefficient is equal to 0.
c. The p-value is only meaningful if the R-square value is greater than 0.7.
d. The larger the p-value, the higher the probability that the variable is statistically significant.
Your answer: b. The larger the p-value, the more confident we are that we should reject the null hypothesis that the population coefficient is equal to 0.
Option b is true regarding p-values associated with the estimated coefficients in a linear regression model. The p-value represents the probability of observing a test statistic as extreme or more extreme than the one observed, assuming that the null hypothesis is true.
Therefore, the larger the p-value, the more likely it is that the estimated coefficient is not significantly different from 0 and we fail to reject the null hypothesis. A p-value of less than 0.05 is commonly used to indicate statistical significance. The R-square value, which measures the proportion of variance in the dependent variable explained by the independent variable(s), is not directly related to the p-value.
Learn more about hypothesis here:
https://brainly.com/question/29519577
#SPJ11
the salary for workers at a company are normally distributed with a mean of $60,000 and a standard deviation of $9,000. a random sample of 36 employees was taken. the top 10% salaries of workers at that company is or more. round to the nearest dollar.
To find the top 10% salaries of workers at the company, we need to use the standard normal distribution table. First, we need to find the z-score that corresponds to the top 10% of the distribution, which is 1.28 (found using the table).
Next, we can use the formula:
z = (x - mean) / (standard deviation / sqrt(sample size))
We know the mean is $60,000, the standard deviation is $9,000, and the sample size is 36. We can solve for x:
1.28 = (x - 60,000) / (9,000 / sqrt(36))
1.28 = (x - 60,000) / 1,500
1.28 * 1,500 = x - 60,000
1,920 + 60,000 = x
x = $61,920
Therefore, the top 10% salaries of workers at the company is $61,920 or more.
To find the top 10% salary for workers at this company, we need to first determine the z-score that corresponds to the 90th percentile. This is because 100% - 10% = 90%.
Step 1: Look up the z-score for the 90th percentile in a standard normal distribution table. You will find a z-score of approximately 1.28.
Step 2: Use the z-score formula to find the salary corresponding to this z-score:
X = μ + Z * σ / √n
where X is the salary, μ is the mean, Z is the z-score, σ is the standard deviation, and n is the sample size.
Step 3: Plug in the given values:
X = $60,000 + 1.28 * $9,000 / √36
Step 4: Simplify the equation:
X = $60,000 + 1.28 * $9,000 / 6
Step 5: Calculate the result:
X = $60,000 + $1,920 = $61,920
The top 10% of salaries for workers at this company is $61,920 or more, rounded to the nearest dollar.
To learn more about standard deviation : brainly.com/question/23907081
#SPJ11
(PLEASE AND ASAP I WILL GIVE 100 PIONTS) What is the horizontal distance between (–14, –20) to (7, –20)?
7 units
21 units
–7 units
–21 units
Answer:
The two points have the same y-coordinate of -20, so they lie on the same horizontal line.
Step-by-step explanation:
To find the horizontal distance between them, we can simply subtract their x-coordinates:
distance = 7 - (-14) = 7 + 14 = 21
Therefore, the horizontal distance between (–14, –20) and (7, –20) is 21 units.
Answer:
Step-by-step explanation:
21 units
the table shows the u.s. city average price of iceberg lettuce, in cents per pound, for selected months and years. price of iceberg lettuce (cents per pound) month year feb mar apr may jun 2004 80.5 81.3 80.1 71.0 75.1 2005 73.0 82.9 100.4 92.6 89.5 2006 79.4 81.5 86.9 96.7 84.8 2007 92.0 91.5 98.6 87.9 85.6 2008 89.5 87.3 90.2 86.8 86.0 2009 93.0 87.5 90.7 88.7 87.6 classify the april 2007 price of 98.6 cents per pound. justify your classification. it is a relative maximum because it is larger than all eight surrounding prices. it is a relative minimum because it is smaller than all eight surrounding prices. it is a saddle point because it is larger than the two adjacent prices in the same column, but smaller than the two adjacent prices in the same row. it is a saddle point because it is larger than the two adjacent prices in the same row, but smaller than the two adjacent prices in the same column. it is a saddle point because it is larger than the two adjacent prices on one diagonal, but smaller than the two adjacent prices on the other diagonal. correct: your answer is correct. classify the april 2008 price of 90.2 cents per pound. justify your classification. it is a relative maximum because it is larger than all eight surrounding prices. it is a relative minimum because it is smaller than all eight surrounding prices. it is a saddle point because it is larger than the two adjacent prices in the same column, but smaller than the two adjacent prices in the same row. it is a saddle point because it is larger than the two adjacent prices in the same row, but smaller than the two adjacent prices in the same column. it is a saddle point because it is larger than the two adjacent prices on one diagonal, but smaller than the two adjacent prices on the other diagonal. correct: your answer is correct. there are three additional critical points in the table. find these points. relative maximum point apr correct: your answer is correct. , 2005 correct: your answer is correct. , 100.4 correct: your answer is correct. relative minimum point feb incorrect: your answer is incorrect. , 2005 incorrect: your answer is incorrect. , saddle point ---select--- , ---select--- ,
The relative maximum point in April 2005, was 100.4; the relative minimum point in May 2004, was 71.0; the saddle point in June 2006, was 84.8.
The April 2007 price of 98.6 cents per pound is a saddle point because it is larger than the two adjacent prices in the same row (91.5 and 87.9), but smaller than the two adjacent prices in the same column (86.9 and 100.4).
The April 2008 price of 90.2 cents per pound is a relative minimum because it is smaller than all eight surrounding prices.
The three additional critical points in the table are:
1. Relative maximum point: April 2005, 100.4
2. Relative minimum point: May 2004, 71.0
3. Saddle point: February 2006, 79.4 (larger than the two adjacent prices in the same row, but smaller than the two adjacent prices in the same column).
Learn more about Maximum:
brainly.com/question/17467131
#SPJ11
How much will 2 pencils cost if 7 pencils cost $1.82
Answer:
$0.52
Step-by-step explanation:
1. Find the cost of 1 pencil by dividing the cost of 7 pencils by 7 pencils:
1.82 / 7 = 0.26
This means 1 pencil cost $0.26.
2. To find the cost of 2 pencils multiply the cost of 1 pencil by 2:
0.26 x 2 = 0.52
Hence, 2 pencils cost $0.52 of 7 pencils cost $1.82.
Which statements are always true regarding the diagram? Select three options.
A m∠5 + m∠3 = m∠4
B m∠3 + m∠4 + m∠5 = 180°
C m∠5 + m∠6 =180°
D m∠2 + m∠3 = m∠6
E m∠2 + m∠3 + m∠5 = 180°
Answer:
C: m∠5 + m∠6 =180°
D: m∠2 + m∠3 = m∠6
E: m∠2 + m∠3 + m∠5 = 180°