Part a: Ignoring those that are bigger than 4.
Part b: labeling the random number.
Part c: conclusion, Claire should plan to purchase 12 boxes.
Describe the term random number table?A table of digits is a random number table. The numbers 1, 2, 3,4,5,6,7,8,9,0 were used as the starting point for the random procedure that selected the digit for each location in the table. Each digit had an equal chance of being selected.Part a: random number table;
Let each of five trials figures be represented by a number from 0 to 4.Pick digits at random from a table of numbers, ignoring those that are bigger than 4. Determine how many digits (0–4) from the table—including repeats—are required to get all five numbers. One try, like this.Part b: labeling the random number.
7318495907 05179 51002(10 boxes) 8337452297 07769 99792 78365 9348772753 36216 (15 boxes) 07230 35793 71907 65571 66784(10 boxes) 25548 91861 15725.
Part c: conclusion,
On average, Claire should plan to purchase 12 boxes.
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You purchase 5 pounds of apples and 2 pounds of oranges for $9. Your
friend purchases 5 pounds of apples and 6 pounds of oranges for $17.
a. Write a system of linear equations that represents this situation.
b. What is the price per pound for apples?
c. What is the price per pound for oranges?
Answer:
8 pounds of oranges for $12.
Step-by-step explanation:
Match each item with the correct unit price.
1. 78 cents each 20 for $1.56
2. 40 cents each 2 for one dollar
3. $1.05 each 5 at $3.90
4. 7.8 cents each $3.78 for 6
5. 63 cents each 1 for $1.58
The correct unit prices are,
1. 20 for $1.56 = A. 7.8 cents each
2. $3.78 for 6 = B. 63 cents each
3. 2 1/2 for one dollar = C. 40 cents each
4. 5 at $3.90 = D. 78 cents each
5. 1 1/2 for $1.58 = E. $1.05 each
From the given cases;
1. Given that 20 things cost $1.56,
So, the price of one item is = $1.56/20
= $0.078.
Cents for every dollar,
So, $0.078 equals $0.078 * 100
= 7.8 cents.
2. Since the cost of six products is $3.78,
The cost of one item is 3.78/6
= $0.63.
Cents for every dollar,
Thus, $0.63 equals $0.63 * 100
= 63 cents.
3. 2 1/2 = 5/2 = 1 as a price
So, the price of one item is equal to 2/5 of a dollar, or 100 cents.
$2/5 equals 2/5 * 100, or 40 cents.
4. Given that the price of 5 things is $3.90
The price of 1 item is 3.90/5, or $0.78.
Cents for every dollar
So, $0.78 = $0.78 * 100 = 78 cents.
5. Cost of 1 1/2 = 3/2 = $1.58
So, cost of 1 item = 1.58/(3/2)
= 1.05
Hence, these are the solutions for the given cases.
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An event manager is tracking participation in a tournament by age group. The manager created the following histogram:
Histogram with title Tournament Participants, horizontal axis labeled Age Group (year) with bins 0 to 19, 20 to 39, 40 to 59, and 60 to 79 and vertical axis labeled Number of People with values from 0 to 60 at intervals of 10. The first bin goes to 30, the second goes to 50, the third goes to 40, and the last goes to 10.
What percentage of the tournament participants are under the age of 20? Round to the nearest whole percent.
10%
23%
30%
77%
Round to the closest whole percent, 23% of the participants in the event are under the age of 20.
Define the term percentage of the number?Rather than being expressed as a fraction, a percentage is a piece of a whole presented as a number ranging from zero and 100. None of this is zero percent; everything is 100 percent; half of something is 50 percent; and nothing is zero percent. You divide the part of the overall number by the entirety and multiply the result by 100 to get the percentage.For the stated question-
Total number of people = 30 + 50 + 40 + 10
Total number of people = 130
Number of participants are under the age of 20 = 30.
Let 'x' be the % of the participants are under the age of 20.
Thus,
x% of 130 = 30
x = 30 x 100 / 130
x = 23.07
x = 23%
Thus, round to the closest whole percent, 23% of the participants in the event are under age of 20.
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The map of Texas shows several major cities in Texas. On the map 1 inch (in) represents
75 miles (mi). Use the map to answer questions 1-3.
Answer:
1. 150mi
2. 2&1/2
3. He needs to know how many miles is each city.
Step-by-step explanation:
At a real estate agency, an agent sold a house for $348000. The commission rate is 7.5% for the real estate agency and the commission rate for the agent is 25%
of the amount the real estate agency gets. How much did the agency make on the house? How much did the agent earn in commission?
The amount which the agency makes on the house as described is; $26,100.
The amount earned in commission by the agent is; $6,525.
What is the amount made by the agency on the house?It follows from the task content that the house in discuss was sold for $348,000.
Also, since the commission rate for the real estate agency is; 7.5%.
It therefore follows that the commission earned by the real estate agency is;
7.5% of 348,000 = 0.075 × 348,000
= $26,100.
Also, since the commission rate for the agent is 25% of the agency's commission.
Therefore, the amount earned by the agent is;
25% of 26,100 = 0.25 × 26,100
= $6,525.
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if the set s consists of five consecutive positive integers, what is the sum of these five integers? the integer 11 is in s, but 10 is not in s. the sum of the even integers in s is 26.
Answer:
sum = 65
Step-by-step explanation:
You want the sum of the set of 5 consecutive positive integers such that the sum of the even integers in the set is 26.
SolutionThe sum of even integers will be a multiple of 3 if the middle integer of the set is even. Here, that sum is 26, not a multiple of 3. Hence the middle integer of the set is 26/2 = 13, and the sum of the set is 13·5 = 65.
The sum of the five integers is 65.
__
Additional comment
When working "consecutive integer" problems, it is often useful to think in terms of the average of the integers, the middle one of an odd-length set, or the number halfway between the two middle ones of an even-length set.
A set of 5 integers will have either 3 odds and 2 evens, or 3 evens and 2 odds. The set here obviously does not have 3 even integers (whose sum would be 3 times the middle one).
The set is s = {11, 12, 13, 14, 15}. 10 is not in the set, but 11 is. The sum of evens is 12+14=26.
All Harriet wants for her 12th birthday is a pet dawef hamster, maybe even mire than one so the hamster doesnt get lonley. To prove to her parents how responsible she can be, sje bought a cage that has a 12- inch by 2 1/3 foot floor space and even did some research on the needs of dwarf hamsters. Harriet found out that each dwarf hamster requires atkeast 2/3 square foot of living soace. How mahy dwarf hamsters can live in the cage Harriet purchased?
Mathematically, three dwarf hamsters can live in the cage Harriet purchased.
How is the number determined?The number of dwarf hamsters that can live in Harriet's cage is determined using mathematical operations, including multiplication and division.
Mathematical operations involve the manipulation of numbers, variables, and mathematical operands to determine mathematical results.
The result of an addition is known as the sum while for a subtraction operation is the difference.
The result of a multiplication operation is known as the product like a dvision operation (also called the quotient).
The height of the cage = 12 inches or 1 foot
The length of the cage = 2¹/₃ feet
The area of the cage = 2¹/₃ ft² (1 x 2¹/₃)
The living space required by each dwarf hamster = ²/₃ ft²
The number of dwarf hamsters that can live in the cage = 3.499 (2¹/₃ ÷ ²/₃).
= 3
Thus, using mathematical operations, we can determine that the highest number of dwarf hamsters that can live in Harriet's cage is three.
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can someone help me with this problem please…? ;))
Answer:
B.
Process of elimination.
A is incorrect because 6 out of 10 people is 60 percent.
C is wrong because if you consider just half (50 percent) of 65, you'll get 32.5 . In order to get 65 percent, C would have to be over 32.5, and 10 is not.
D is wrong because once again, half (50 percent) of 13 is 6.5 and in order to get 65 percent, D would have to be over 6.5, and 5 is not.
wyatt can husk at least 12 dozen ears of corn per hour and at most 18 dozen ears of corn per hour. based on this information, what is a possible amount of time, in hours, that it could take wyatt to husk 72 dozen ears of cor
Wyatt can husk anywhere from 12 to 18 dozen ears of corn per hour.
To find the possible amount we need to calculate the maximum and minimum time period in hours
Thus, if we need to find the time taken to husk 72 dozen ears of corn, the maximum time would be ,
=72 / 12 hours
=6 hours
And the minimum time would be used for the does wyatt takes to husk the 72 dozen of corn
=72/18 hours
=4 hours
Thus, depending on his speed, Wyatt takes anywhere from 4 to 6 hours to husk 72 dozen ears of corn.
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Jessica reduced the size of a rectangle to a height of 2 inches. What is the new width if it
was originally 4 inches tall and 8 inches wide?
The new width is 4 inches.
Step-by-step explanation:The Property of Equality:Since Jessica reduced one side (the length), that means that she also reduced the other side (the width) by the same number:
Original length:
4
New length:
2
4 ÷ 2 = 2
Original Width:
8
New Width:
4
8 ÷ 2 = 4
Solution:4 inchesI hope my answer helped you! If you need more information or help, comment down below and I will be sure to respond if I am online. Have a wonderful rest of your day!
Answer:
2/12 = 1/6
24 * 1/6 = 4
or
12/24 = 2/x
12 x = 48
x = 4
or the original width was twice the length
twice 2 is 4
maybe
Find the equation of a line that passes through the points (1,-5) and (3,-6). Leave your answer in the form y = m x + c.
Place the figures in order from least volume to greatest volume.
you are the manager of a restaurant for a fast-food franchise. last month, the mean waiting time at the drive-through window for branches in your geographical region, as measured from the time a customer places an order until the time the customer receives the order, was 3.6 minutes. you select a random sample of 81 orders. the sample mean waiting time is 3.45 minutes, with a sample standard deviation of 0.9 minute. complete parts (a) and (b) below. question content area bottom part 1 a. at the 0.05 level of significance, is there evidence that the population mean waiting time is different from 3.6 minutes? state the null and alternative hypotheses.
There is not evidence that the population mean waiting time is different from 3.6 minutes.
What is the p-value?
A statistical measurement known as a p-value is employed to check a hypothesis' validity against actual data. A p-value calculates the likelihood of getting the outcomes that were observed, presuming that the null hypothesis is correct. The statistical significance of the difference that was found increases with decreasing p-value.
From the question, we know that the size (n), the mean (x), and the standard deviation (s) of the sample are 81, 3.45 minutes and 0.9 minutes. Additionally, we are going to decide if the waiting time is different or not from 3.6 minutes, so the null and alternative hypotheses are:
H0: m=3.6
H1: m≠3.6
Where m is the mean of the population.
Then, we don't need to be concerned about the shape of the population distribution because the value of the n is bigger than 30 and we can use the statistic z as:
[tex]z = \frac{x-m}{\frac{a}{\sqrt{n} } }[/tex]
So, replacing the values, the test statistic is:
[tex]z = \frac{3.45 - 3.6}{\frac{0.9}{\sqrt{81} } }[/tex]
= 2.50
On the other hand, the p-value for this test is calculated as:
p-value = 2P(z >2.50) = 2(0.0668) = 0.134
Taking into account that the p-value is bigger than the level of significance 0.01, the null hypothesis is not rejected, and there is not evidence that the population mean waiting time is different from 3.6 minutes.
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Select the correct answer.
What are the solutions of this quadratic equation?
x² + 2x = -2
OA.
OB.
O C.
OD.
x = 1 ti
x= -1 ti
x = 0
x = ti
Answer:
The answer might be C.(x=0)
Step-by-step explanation:
hope this helps!
What number is 0.44 more than 0.25?
Answer: 0.69
Step-by-step explanation:
0.44 + 0.25 = 0.69
The correct answer is [tex]\boxed{0.69}[/tex]
How did figure out this?For this question we will be adding the numbers given.
Given:
[tex]0.44\\0.25[/tex]
Therefore, the equation is:
[tex]\boxed{0.44 +0.25}[/tex]
Adding the given numbers 0.44 and 0.250.44 + 0.25 = 0.69Therefore, the correct answer is [tex]\boxed{0.69}[/tex]
A computer store buys a computer system at a cost of $456.60. The selling price was first at 776 , but then the store advertised a 10% markdown on the system.Members of the store's loyalty club get an additional 10% off their computer purchases. How much do club members pay for the computer with their discount?
Answer: The selling price was at first $776 but then the store advertised a 30% markdown on the system. Find the current sale price.
Step-by-step explanation:
$776 - (30% of $776) = $ x :: current sale price
776 - 776 * 0.3 = x
776 * (1 - 0.3) = x
776 * 0.7 = 543.20
Current sale price for the computer system is $543.20.
What value does each equation need to be multiplied by in order to eliminate the y-terms?
Equation 1: 6x − 5y = -4
Equation 2: 4x + 2y = 28
Please Help, I don't get it
Equation 1 needs to be multiplied with + 2
Equation 2 needs to be multiplied with + 5.
Step-by-step explanation:
Here, the given system of equation is given as:
Equation 1 : 6 x − 5 y = -4
Equation 2: 4 x + 2 y = 28
Here, in equation 1, the coefficient of y = - 5
Also, in the equation 2, the coefficient of y = + 2
Now, in order to eliminate the y coefficients,
Coefficient of y in 1 = - Coefficient of y in 2
Now, to make -5 and + 2 to eliminate each other,
Multiply -5 with 2, we get -5 x 2 = -10
And Multiply the coefficient + 2 with 5, we get +2 x 5 = + 10
The new coefficient of y is equation 1 = - 10 y
The new coefficient of y in equation 2 = + 10 y
They will cancel out each other, when both equations are ADDED.
Hence, equation 1 needs to be multiplied with + 2
and the equation 2 needs to be multiplied with + 5.
Solve the equation for v.
0.5v + 0.06 < 3.46
v > 1.8
v < 1.8
v > 6.8
v < 6.8
Answer:
[tex]\boxed{\tt v < 6.8}[/tex]
Step-by-step explanation:
[tex]\tt 0.5v+0.06 < 3.46[/tex]
Multiply both sides by 100:-
[tex]\tt 0.5v\times\:100+0.06\times\:100 < 3.46\times\:100[/tex]
[tex]\tt 50v+6 < 346[/tex]
Subtract 6 from both sides:-
[tex]\tt 50v < 340[/tex]
Divide both sides by 50:-
[tex]\tt \cfrac{50v}{50} < \cfrac{340}{50}[/tex]
[tex]\tt v < \cfrac{34}{5}[/tex]
Or
[tex]\tt v < 6.8[/tex]
Therefore, your answer is v < 6.8!!! :)
______________________
Hope this helps!
Have a great day!
does the sequence { y k } converge? recall that there are four notions of convergence of random variables viz., almost sure, mean square, in probability and in distribu- tion. you should answer this question for each of these four modes of convergence. whenever you have convergence, also indicate what the limiting random variable is
Consider a sequence of random variables X1, X2, X3, ⋯ that is defined on an underlying sample space S. For simplicity, let us assume that S is a finite set, so we can write
S = {s₁, s₂,⋯,sₙ }.
Remember that each Xₙ is a function from S to the set of real numbers. Thus, we may write
Xₙ (sₐ) = xₙₐ, for a=1,2,⋯,k.
After this random experiment is performed, one of the sₐ' s will be the outcome of the experiment, and the values of the Xₙ's are known. If sₐ is the outcome of the experiment, we observe the following sequence:
x₁ₐ ,x₂ₐ,x₃ₐ,⋯.
Mean Square Convergence:Let [Xₙ] be a sequence of square integral random variables defined on a sample space Omega. We say that [Xₙ] is mean-square convergent (or convergent in mean-square) if and only if there exists a square integral random variable X such that
[tex]\lim_{n \to \infty} E[ X_{n} - X^{2} ][/tex]
Distribution Convergence:Convergence in distribution is in some sense the weakest type of convergence. All it says is that the CDF of Xₙ's converges to the CDF of X as n goes to infinity. It does not require any dependence between the Xₙ's and X. We saw this type of convergence before when we discussed the central limit theorem. To say that Xₙ converges in distribution to X, we write:
Xₙ →d X.
Probability Convergence:Convergence in probability is stronger than convergence in distribution. In particular, for a sequence X₁, X₂, X₃, ⋯ to converge to a random variable X, we must have that P(|Xₙ−X|≥ϵ) goes to 0 as n→∞, for any ϵ>0. To say that Xₙ converges in probability to X, we write:
Xₙ →p X.
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a city hosted a music festival that included three concerts. according to the sales database, 28% of the audience attended the first concert, 42% attended the second one, 30% attended the third one, 80% attended at least one of the three concerts, 10% attended the first and second ones, 8% attended the first and third ones, and 7% attended the second and third ones. find the probability that a randomly selected audient attended all the concerts? assume event a: an audient attended the first concert; event b: an audient attended the second one; event c: an audient attended the third one.
Probability that randomly selected audient attend all the concerts is 0.05.
What is probability?
Probability refers to potential. A random event's occurrence is the subject of this area of mathematics. The range of the value is 0 to 1. Mathematics has incorporated probability to forecast the likelihood of various events. The degree to which something is likely to happen is basically what probability means. You will understand the potential outcomes for a random experiment using this fundamental theory of probability, which is also applied to the probability distribution. Knowing the total number of outcomes is necessary before we can calculate the likelihood that a specific event will occur.P(A) = 28/100 = 0.28
P(B) = 42/100 = 0.42
P(C) = 30/100 = 0.30
P(A∩B) = 10/100 = 0.10
P(A∩C) = 8/100 = 0.08
P(B∩C) = 7/100 = 0.07
P(A∪B∪C) = 80/100 = 0.80
P(A∩B∩C) = ?
P(A∪B∪C) = P(A) + P(B) + P(C) - P(A∩B) - P(A∩C) - P(B∩C) + P(A∩B∩C)
P(A∩B∩C) = - 0.28 - 0.42 - 0.30 + 0.10 + 0.08 + 0.07 + 0.80
= 0.05
Probability that randomly selected audient attend all the concerts is 0.05.
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The Central Limit Theorem states that The distribution of the population mean p will be about normal provided that the sample size n is sufficiently large If the sample size n is large, then z follows a standard normal distribution, provided that the population is normally distributed The sample mean X will always equal the population mean / when the sample size n is large enough_ As the sample size n gets larger and larger, the sampling distribution of the sample mean X is less concentrated around the central value The sampling distribution of the sample proportion p will be approximately normal provided that the population is normally distributed The sampling distribution of the sample mean x will be about normal provided that the sample size n is sufficiently large
the standard deviation of the sample means:
σ(x) = σ/[tex]\sqrt{n}[/tex]
The central limit theorem states that if you have a population with mean μ and standard deviation σ and take sufficiently large random samples from the population with replacement text annotation indicator, then the distribution of the sample means will be approximately normally distributed. This will hold true regardless of whether the source population is normal or skewed, provided the sample size is sufficiently large (usually n > 30). If the population is normal, then the theorem holds true even for samples smaller than 30. In fact, this also holds true even if the population is binomial, provided that min(np, n(1-p))> 5, where n is the sample size and p is the probability of success in the population. This means that we can use the normal probability model to quantify uncertainty when making inferences about a population mean based on the sample mean.
For the random samples we take from the population, we can compute the mean of the sample means:
μ (x) = μ
and the standard deviation of the sample means:
σ(x) = σ/[tex]\sqrt{n}[/tex]
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help guys i don’t understand
Answer:
Step-by-step explanation:
You need to set the problem up like this:
VX=VW+WX. 4x=3x+5subtract 3 from both sides. x=5because 'x' equals 5, plug that 4(5)=3(5)+5back in for all the 'x's
simplify the equation 20=20The length of the line segmentshould be 20
Determine the distance between the points (−1, −4) and (−9, −8).
square root of 208 units
square root of 166 units
square root of 124 units
square root of 80 units
The required distance between the points (−1, −4) and (−9, −8). is the square root of 80 units. Option D is correct.
Given that,
The distance between points (−1, −4) and (−9, −8) is to be determined.
Distance is defined as the object traveling at a particular speed in time from one point to another.
here,
D = √[[x₂ - x₁]² + [y₂+ - y₁]²]
Substitute the value in the above equation,
D = √[[-9 + 1]² + [-8 + 4]²]
D = √[[-8]² + [ 4]²]
D = √[64 + 16]
D = √80
Thus, the required distance between the points (−1, −4) and (−9, −8). is the square root of 80 units. Option D is correct.
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Answer:
the person above is correct, the answer is D "[tex]\sqrt{80[/tex] units"
Step-by-step explanation:
I took this exam and got this answer right, hope this helps :))
Solve: cosine (x + pi) = one-half over the interval left-bracket startfraction pi over 2 endfraction, pi right-bracket.
The values that represent the solution to [tex]cos (\frac{\pi }{4} - x) = \frac{\sqrt{2} }{2} sin x[/tex] ,
x ∈ [0, 2·π) are:
[tex]x = (\frac{\pi }{2} , \frac{3\pi }{2} )[/tex]
Sine and Cosine are trigonometric functions of an angle. The sine and cosine of an acute angle are defined in the context of a right triangle: for the specified angle, its sine is the ratio of the length of the side that is opposite that angle to the length of the longest side of the triangle (the hypotenuse), and the cosine is the ratio of the length of the adjacent leg to that of the hypotenuse. For an angle θ the sine and cosine functions are denoted simply as sinθ and cos θ.
Once such a triangle is chosen, the sine of the angle is equal to the length of the opposite side, divided by the length of the hypotenuse:
Sin (α) = [tex]\frac{opposite}{Hypotenuse}[/tex] and Cos (α) = [tex]\frac{Adjacent}{Hypotenues}[/tex]
Given in the question:
The given function is presented as follows;
[tex]cos (\frac{\pi }{4} - x) = \frac{\sqrt{2} }{2} sin x[/tex]
Where;
x ∈ [0, 2·π)
We have;
cos(A - B) = cos(A)·cos(B) - sin(A)·sin(B)
[tex]cos (\frac{\pi }{4} ) = \frac{\sqrt{2} }{2} , sin( \frac{\pi }{4)} =\frac{\sqrt{2} }{2}[/tex]
Which gives
[tex]cos(\frac{\pi }{4} - x ) = \frac{\sqrt{2} }{2} cos x +\frac{\sqrt{2} }{2} sinx[/tex]
Therefore, we get;
[tex]\frac{\sqrt{2} }{2} cos x = \frac{\sqrt{2} }{2} sinx - \frac{\sqrt{2} }{2} = 0[/tex]
cos x = 0
[tex]cos (\frac{\pi }{2} ) =0[/tex]
Therefore;
The possible solutions (x-values) to cos x = 0 are;
[tex]0\leq \frac{n.\pi }{2} \leq 2\pi[/tex]
Where;
n = 1, 3, 5, ...
x ∈ [0, 2·π)
We get; [tex]x = \frac{\pi }{2} or \frac{3\pi }{2}[/tex]
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A type of green paint us made by mixing 2 cups of yellow with 3.5 cups of blue. a. Find a mixture that will make the same shade of green but larger amount.
Step-by-step explanation:
easiest example : multiply both (it is important to do it to both) by 2 :
2×2 = 4 cups of yellow
3.5×2 = 7 cups of blue
will make the same shade of green, as the mixing ratio is the same.
just, instead of 5.5 cups, it gives us 11 cups of green paint (surprise, surprise, this is also twice as much) .
what is the remainder when the positive integer n is divided by the positive integer k, where k > 1 ? (1) n
The remainder will be less than k, when the positive integer n is divided by the positive integer k, where k > 1.
What are integers?Positive, negative, and zero are all examples of integers. The Latin word "integer" signifies "whole" or "intact." As a result, fractions and decimals are not included in integers. In this essay, we will learn more about integers, their definition, and their characteristics.
All whole numbers and negative numbers are considered integers. This means that if we combine negative numbers with whole numbers, a collection of integers results.
An integer, which can comprise both positive and negative integers, including zero, is a number without a decimal or fractional portion. Integers include things like -5, 0, 1, 5, 8, 97, and 3,043. Z is a set of integers.
Hence, The remainder will be less than k, when the positive integer n is divided by the positive integer k, where k > 1.
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What is fractions for this pls help
Answer:
Step-by-step explanation:
1 1.5/2
You are separating 16 tomatoes equally among 3 baskets.
Drag tomatoes to show how many tomatoes will be in each basket and how many tomatoes will be left over.
central limit theorem: nationally, the composite score of students taking the act (american college testing) college entrance examination has a normal distribution with a mean of 18.0 and a standard deviation of 6.0. at kent roosevelt high school, 36 seniors take the test. assume the act scores at this school have the same distribution as national scores and the students who take the act test are considered as a simple random sample.a. Then the average ACT score of the sample of Kent Roosevelt students who took the test has a distribution function b. with mean c. and standard deviation (standard error)
The standard deviation of the sampling distribution of the average (sample mean) score for the 36 students = 1
What is standard deviation?
The standard deviation of the sampling distribution of mean is given by :- σₓ = σ/√n, where = population standard deviation and n= sample size.
According to the given question:
The scores of individual students on the American college testing program composite college entrance examination have a normal distribution with mean 18.0 and standard deviation 6.0. at kent roosevelt high.
i.e. μ = 18.0, σ = 6.0
Sample size : n= 36
Then, the standard deviation of the sampling distribution of the average (sample mean) score for the 36 students will be :-
σₓ = 6/√36 = 1
Hence, The standard deviation of the sampling distribution of the average (sample mean) score for the 36 students = 1
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A group of engineers developed a new design for a steel cable. They need to estimate the amount of weight the cable can hold. The weight limit will be reported on cable packaging. The engineers take a random sample of 44 cables and apply weights to each of them until they break. The 44 cables have a mean breaking weight of 778. 1 lb. The standard deviation of the breaking weight for the sample is 15. 5 lb
(767.47, 777.13) is the confidence interval in the given situation.
What is the confidence interval?A confidence interval is a range of estimates for an unknown parameter in frequentist statistics.
The 95% confidence level is the most popular, but other levels, like 90% or 99%, are occasionally used when computing confidence intervals.
[tex]\begin{aligned}&\mathrm{CI}=(772.3-4.83,772.3+4.83) \\&\mathrm{CI}=(767.47,777.13)\end{aligned}[/tex]
Therefore, (767.47, 777.13) is the confidence interval in the given situation.
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