The correct answer is
H₀ : μh - μc = 0
H₀ : μh - μc ≠ 0
Given that,
Regarding the subsequent 3 inquiries: A study collected information on how much time 28 randomly chosen high school students and 31 randomly chosen college students spent each day on their cellphones. The researcher is interested in learning whether there is proof that students use their phones for varying amounts of time in high school and college.
Because the samples of college and high school students are independent, the independent samples t-test should be utilized.
The study's research (Claim) aims to ascertain whether students' cell phone usage patterns alter between high school and college.
For the independent samples t-test and the stated claim, the proper null and alternate hypotheses are,
H₀ : μh - μc = 0
H₀ : μh - μc ≠ 0
To learn more about hypotheses click here:
brainly.com/question/18064632
#SPJ4
The proper null and alternative hypotheses are
[tex]H_{0}[/tex] : μh = μc
[tex]H_{A}[/tex] : μh - μc
The study's research wants to ascertain whether difference between the time spent by high school students and college students.
The actual test begins by considering two hypothesis i.e. null hypothesis and alternative hypothesis.
Let, H= time spent on the phone by high school students;
C= Time spent on the phone by college students; and
d=H−C
For the independent samples t-test and the stated claim, the proper null and alternate hypotheses are,
[tex]H_{0} :[/tex] μh = μc (time spent by high school students is equal to college students)
[tex]H_{A} :[/tex] μh - μc (difference between the time spent by high school students and college students)
To learn more about hypotheses click here:
brainly.com/question/18064632
#AAA
For the weight of the box that she measured, beatriz determined the margin of error as 23. 5 pounds to 24. 5 pounds. What was the greatest possible error for her actual measurement?.
The greatest possible error for her actual measurement 0.5 pounds
What is a mistake, exactly?
A mistake is an inaccurate or incorrect action (the Latin word error, which means "wandering"). Sometimes the terms "mistake" and "error" are used synonymously. The Latin word "errare," which means "to stray," is the source of the etymology.
Given:
Beatriz calculated the error range to be 23.5 to 24.5 pounds.
How much room did she have for error in her actual measurement?
Solution:
We initially locate the median of the supplied numbers before calculating the margin of error.
23.5 and 24.5 as the median
[tex]M=\frac{23.5+34.5}{2}= \frac{48}{2}=24[/tex]
Therefore, the largest inaccuracy is 24.5-24 = 0.5 pounds.
As a result, 0.5 pounds is accurate.
Learn more about error
https://brainly.com/question/11472659
#SPJ4
question in a statistics class with 32 students, how many ways can a group of 5 lucky students be selected to sit in the front of the classroom?
There are 201376 ways can a group of 5 lucky students be selected to sit in the front of the classroom.
What are combinations?
Combinations are mathematical operations that count the variety of configurations that can be made from a set of objects, where the order of the selection is irrelevant. You can choose any combination of the things in any order.
Permutations and combinations are often mistaken. The chosen components' order is crucial in permutations, though. For instance, whereas permutations treat the arrangements differently, combinations treat the arrangements ab and ba equally (as one arrangement).
Use the combinations formula:
n = 32, r=5
[tex]^{n}C_{r}=\frac{n!}{(n-r)! r!}[/tex]
[tex]^{32}C_{5}=\frac{32!}{(32-5)! 5!}[/tex]
= (32*31*30*29*28*27!)/(5!*27!)
= (32*31*30*29*28)/ (5*4*3*2*1)
= 201376
To learn more about the combinations from the given link
https://brainly.com/question/26852614
#SPJ4
n this scenario, what is the test statistic? the digital marketing specialist would like to test the claim that the percent of customers who use online coupons when making an online purchase is different than 75%. sample size
The test statistic is 3.10
Hypothesis :
In statistics, hypothesis testing is used to identify the variance in the group of data that results from genuine variation. Based on the presumptions, the sample data are taken from the population parameter. The hypothesis can be divided into many categories. A hypothesis is described in statistics as a formal statement that explains the relationship between two or more variables belonging to the specified population. It aids the researcher in converting the stated issue into an understandable justification for the study's findings. It provides examples of various experimental designs and guides the investigation of the research procedure.
Complete question:
In this scenario what is the test statistic? • The digital marketing specialist would like to test the claim that the percent of customers who use online coupons when making an online purchase is different than 75% Sample size = 80 online customers • Sample proportion = 0.90 Calculate the test statistic using the formula: P-Po where • p = sample proportion, n sample size, and po - population proportion under the null hypothesis Round your answer to 2 decimal places. Provide your answer below:
To learn more about hypothesis visit: https://brainly.com/question/29519577
#SPJ4
with 50 gallons of fuel in its tank, the airplane has a weight of 2195 pounds. what is the weight of the plane with 17 gallons of fuel in its tank?
The airplane with 17 gallons will weight 746.3 pounds.
What is unitary method ?With the unitary method, you first determine the value of a single unit before determining the value of the necessary quantity of units. What can values and units be?
Consider going to the store to buy 6 apples. You are informed by the merchant that 10 apples are available for Rs 100. In this scenario, the units are apples and the value is their cost. It's crucial to understand the units and values while using the unitary technique to solve a problem.
Airplane weight with 50 gallons = 2195 pounds
So, airplane weight with 1 gallons = 2195 / 50
= 43.9 pounds
Hence,
Airplane with 17 gallons = 17 * 43.9 pounds
= 746.3 pounds
To learn more about unitary method, visit:
https://brainly.com/question/21648365
#SPJ4
can you help me solve this problem (x - 5)(x+2) = 0
Answer: -2
Step-by-step explanation:
(x - 5) (x + 2) = 0
(x - 5) = 0
(x - 2) = 0
Add 5 to both sides, then simplify. After that, you will subtract 2 from both sides. Simplify again, and the solution is -2.
Given that (-2,3) is on the graph of y=f(x), find a point that must be on the graph of y=f(2x+1)+3. Express your answer as an ordered pair (a,b) where a and b are real numbers.
The point that must be on the graph of y=f(2x+1)+3 is (-6, 0)
What is ordered pair?An ordered pair is a composition of the x coordinate (abscissa) and the y coordinate (ordinate), having two values written in a fixed order within parentheses.
Given that, (-2,3) is on the graph of y=f(x), we need to find a point that must be graphed of y=f(2x+1)+3
3 = f(2X(-3)+1) + 3
0 = f(-6)
Hence, the point on the graph is (-6, 0)
For more references on ordered pair, click;
https://brainly.com/question/28874341
#SPJ1
An equation and some of the steps used to solve the equation are shown below. One step is missing: 2(x-3) + 10x = 5(3 + x) ? 2x-5x + 10x = 15 + 6 7x = 21 x=3 Which set of statements is most likely the missing step and the property that justifies the step?
The missing step was 2x-6+10x= 15+5x, the step where was applied the distributive property.
Applying the distributive property, the given radical expression can be represented by 15.
Properties of MultiplicationThe properties of multiplication are:
Distributive: a(b±c)= ab±acCommutative: a . b = b. aAssociative: a(b+c)= c(a+b)Identity: b.1=bFor answering the question, you should solve the given expression step by step. After that, you should identify the missing step from the information given for the question.
The question gives: 2(x-3) + 10x = 5(3 + x), from the distributive property. you have
2x-6+10x= 15+5x (step 1)
2x -5x +10x = 15+6 (step 2)
7x=21 (step 3)
x=3 (step 4)
See that step 1 (2x-6+10x= 15+5x ) is not shown in the question.
Read more about the distributive property here:
brainly.com/question/4077386
#SPJ1
a survey of nonprofit organizations showed that online fundraising increased in the past year. based on a random sample of nonprofit organizations, the mean one-time gift donation in the past year was $, with a standard deviation of $. if you test the null hypothesis at the level of significance, is there evidence that the mean one-time gift donation is greater than $? interpret the meaning of the p-value in this problem.
A. There is enough data to conclude that the average one-time gift giving exceeds $75. with a 5% loss
B. The probability of receiving a sample mean one-time gift donation of $80 or more is the p-value.
What is a p-value?
The p-value, under the assumption that the null hypothesis is true, is the likelihood of receiving findings from a statistical hypothesis test that are at least as severe as the observed results. The p-value provides the minimal level of significance at which the null hypothesis would be rejected as an alternative to rejection points. The alternative hypothesis is more likely to be supported by greater evidence when the p-value is lower.
P-value is frequently utilized by government organizations to increase the credibility of their research or reports. The United States Census Bureau, for instance, mandates that any analysis with a p-value higher than 0.10 be accompanied by a statement stating that the difference is not statistically significant from zero.
A)
One wants to determine whether there is any proof that the average one-time gift giving exceeds $75.
The right response is thus E, i.e. E. H0:75 Vs H1:>75
Track down the test statistic.
n=54(sample size) (sample size)
Observed mean: 80
Observed standard deviation: 12
valid value=75
test statistic = (12[tex]\sqrt54[/tex])/(80-75)=3.06
Get the p-value by using the R-command shown below:
Lower. Tail=FALSE, p norm (3.06, 0, 1)
There is a 0.001 p-value.
What is the result of this experiment?
At a 5% threshold of significance, we reject H0 since the p-value is less than 0.05. (Los).
A. Dismiss the null theory. There is enough data to conclude that the average one-time gift giving exceeds $75. with a 5% loss
B)
In this situation, explain what the p-value means.
Take into account that the sample mean (Xbar) has a mean of 75 and a standard deviation of 12[tex]\sqrt54[/tex].
The chance that (Xbar) is larger than 80 is then equal to the p-value that was determined before.
The probability of receiving a sample mean one-time gift donation of $80 or more, given that the population mean one-time gift donation is $75, is represented by the p-value, which is B.
Learn more about P-value from the link below
https://brainly.com/question/14790912
#SPJ4
help me please 123456789`10
Answer:
B is in the 1st quadrant
J is slightly in the 2nd quadrant
T is in the 3rd quadrant
P is in the 4th quadrant
Positions:
B.) 4, 3
J.) 0, 7
T.) -4, -4
P.) 4, -6
Tip:When you are looking at an axis graph, picture a big "C" over it, the tip of the "C" is the 1st quadrant, as you go down the "C" it symbolizes each quadrant. When the point is only on one line or axis (depending on which axis), then it is, for example, (0, 3) or (3, 0).
A normal distribution is observed from the number of points per game for a certain basketball player. if the mean (μ) is 15 points and the standard deviation (σ) is 3 points, what is the probability that in a randomly selected game, the player scored greater than 24 points? use the empirical rule
The likelihood that a player will score more than 24 points in a randomly chosen game is 0.0013 or 0.13%.
Explain the term normal distribution?The majority of the observations are centered around the middle peak of the normal distribution, which is a cumulative distribution function which is symmetrical around its mean. The probabilities for values that are farther from the mean taper away equally in both directions.To compute the probability for the a data point, we must first get the value's z-score.
Mean = μ = 15 points
SD = σ = 3 points
When calculating the likelihood that a score will be higher than 24, the z-score for 24 is:
z-score = (x-μ)/σ
z = (24-15)/3
z = 9/3
z = 3
The chance of z3 must now be determined using the z-score table, and it will be deducted from 1 to determine the likelihood of z>3.
P(z < 3) = 0.9987
P(z > 3) = 1 - P(z < 3)
P(z > 3) = 1 - 0.9987
P(z > 3) = 0.0013 = 13%
Thus, the probability that a player will score more than 24 points in a randomly chosen game is 0.0013 or 0.13%.
To know more about the normal distribution, here
https://brainly.com/question/23418254
#SPJ4
need help on 11 and 12! or you can solve one instead of both if u want
Answer:
11. (-4, 5)
12. (0, 2)
Step-by-step explanation:
The solution from the graph is to determine the point of intersection of the two rays. And find the x and y values corresponding to that point.
In 11, the point of intersection is at x = -4, y =5
In 12, the point of intersection is at x = 0, y = 2
I am not clear on what they want you to do for checking the solution. You could mathematically solve for the set of equations.
I think what they mean is to check if your reading of the point coordinates from the graph is correct.
In which case just plug in the values of x and y into both equations in each problem and find if they are consistent
Let's take Problem 12 which has a solution of x = 0, y = 2
Plug in these values into each of the equations:
For 2x - y = -2, with x = 0, y = 2
2(0) - 2 = 0 - 2 = -2 so consistent
For 2x + 4y = 8
2(0) + 4(2) = 0 + 8 = 8
So both equations are consistent with the values read off the graph.
Use the same technique for the others
Hope that helps
How many sides do 2 decagons and 5 hexagons have in all?
Answer: 50 sides
Step-by-step explanation:
a decagon has 10 sides and 2 decagons have 20 sides total
a hexagon has 6 sides and 5 hexagons have 30 total
20 + 30 = 50
Therefore the answer is 50 sides
please help me solve this asap
Answer:
B. Falls
Step-by-step explanation:
If a polynomial has one root in the form a-sqrt b it has a second root in the form of a sqrt b.
The second root is in the form [tex]a+\sqrt{b}[/tex].
Polynomial roots are the solutions to any given polynomial for which the value of the unknown variable must be determined. We can evaluate the value of polynomial to zero if we know the roots. A polynomial of degree 'n' in variable x is an expression of the form [tex]a^nx^n + a^{n-1}x^{n-1} +....+ a^1x^1 + a^0[/tex], where each variable has a constant accompanying it as its coefficient. The term refers to each variable in the expression that is separated by an addition or subtraction symbol. The degree of a polynomial is defined as the maximum power of a polynomial variable.
Given,
one root of polynomial is [tex]a-\sqrt{b}[/tex]
If a given root is complex, its conjugate is the other root. As a result, if a+ib is a root, a-ib is another a root.
If the root given is a surd of the form [tex]a+\sqrt{b}[/tex], then [tex]a-\sqrt{b}[/tex] is another root as well.
If the given root is rational, we can apply the product of the roots rule.
Thus, The polynomial's second root will be [tex]a+\sqrt{b}[/tex].
To learn more about polynomials refer here
https://brainly.com/question/29491359
#SPJ4
Find the Slope please!!
Answer:
The slope is y=-2x.
If solving the equation for the line it is y=-2x-1
for a molecule with the formula ab2 the molecular shape is . question 14 options: a) t-shaped b) trigonal planar c) linear or t-shaped d) linear or bent e) linear or trigonal planar
The shape of the molecule having formula ab2 has been linear or trigonal planar. Hence, the correct option will be e) linear or trigonal planar
What is hybridization?The hybridization is been given as the combining of the valence shells with the formation of the given hybridized shell which have equal energy distribution.
The molecule that has A as a central atom, and B bonded to the fixed central atom. The molecular hybridization of the given molecule will be sp hybridization and that accounts for the linear shape of the molecule according to VSEPR theory.
Hybridization of A having the lone pair, and the shape of the molecule will be trigonal planar.
To learn more about Molecular shapes, visit:
https://brainly.com/question/7558603
#SPJ4
[tex]17x+1+15x+7[/tex]
Answer:
All the best
The answer is fully correct
Which number did he add?
x= 7 and x=11 are two solutions of equation x²+7x-11=0
What is Equation?Two or more expressions with an Equal sign is called as Equation.
The given equation is x²+7x-11=0
x square plus seven times of x minus eleven
Add 11 on both sides
x²+7x=11
x(x+7)=11
x=11
and x+7=11
Now subtract 7 on both sides
x=7
Hence, x= 7 and x=11 are two solutions of equation x²+7x-11=0.
To learn more on Equation:
https://brainly.com/question/10413253
#SPJ1
Find the x value of the axis of symmetry for the following function: f(x) = - 3x ^ 2 + 13x + 10
The axis of symmetry of the equation f(x) = - 3x ^ 2 + 13x + 10 is
x = 13/6How to find the axis of symmetryThe axis of symmetry is calculated
= -b / 2a
The quadratic equation is an equation of the form
ax^2 + bx + c
Comparing the given equation f(x) = - 3x^2 + 13x + 10 with ax^2 + bx + c the values of the axis of symmetry is
x = -b / 2a
x = -13 / 2(-3)
x = -13 / -6
x = 13/6
Learn more on quadratic equations here:
https://brainly.com/question/29227857
#SPJ1
Find the sum of 3x^2 + 2x - 4 and 2x^2 -3x+1
Answer:
5x^2-1x-3
Step-by-step explanation:
First bring the like terms together:
= 3x^2+2x^2+2x-3x-4+1
then solve it
Ans =5x^2-1x-3
I hope its useful
A line passes through (1, 1) and (-3,5).
What is the equation of the line in slope-intercept form?
Answer: Y=-x+2
Step-by-step explanation:
In a one-way ANOVA situation, if the overall F value is statistically significant, then you know that all of the means are significantly different from one another (T/F)?
It is true that in a one-way ANOVA situation, if the overall F value is statistically significant, then you know that all of the means are significantly different from one another.
ANOVA, which represents the analysis of variance, is a statistical test used to examine the distinction between the means of more than two groups.
One independent variable is used in a one-way ANOVA, while two independent variables are used in a two-way ANOVA.
In a one-way ANOVA scenario, the overall F value must be statistically significant for more than two of the means to be significantly different.
thus we can say that the given statement is true.
know more about ANOVA here: https://brainly.com/question/23638404
#SPJ4
45 POINTS
i really need help
--
Hikers walk 3 miles east and then 2 miles north and take a water break. They continue hiking 4 miles east and a final 2 miles south to their destination. What single
transformation took place from their starting position to their final destination? Use
mathematical language and create a graphic to explain your answer. Be sure to use a
straight edge and grid paper for your graphic to represent this problem.
(please add steps and notes)
Answer:
they could've walked 4 miles east to make the trip quicker. Would look alot nicer if i had grid paper
Step-by-step explanation:
_ _ _ _
| |
_ _ _ | |
7 the cost of a pen and a notebook used to be the same, but recently the cost of the pen was increased by $44, whereas, the cost of notebook became $66 less than 55 times its original value.after the revised cost, if the pen was more expensive than the notebook, what could have been the possible original value of both the products, if the initial price was a natural number?
x>2 might the original value of both goods have been if the initial price had been a natural number and the pen had been more expensive than the notebook.
Given that,
Pens and notebooks used to cost the same, however recently the price of the pen went up by $4 while the price of the notebook went down by $6 from its previous value of $5.
We have to find what might the original value of both goods have been if the initial price had been a natural number and the pen had been more expensive than the notebook.
We know that,
We get the equation as
x+4>5x-6
By solving the x
The inequality with x<2.5
So, natural number, n=2
x>2
Therefore, x>2 might the original value of both goods have been if the initial price had been a natural number and the pen had been more expensive than the notebook.
To learn more about number visit: https://brainly.com/question/17429689
#SPJ4
an integer from the range 00000 - 99999 is generated uniformly at random. we are interested only in even integers that start with 2 odd digits where all digits are unique. if we randomly generate 8 of these numbers in succession, what is the probability we get exactly 5 numbers that meet our criteria?
Randomly generating 8 of these numbers in succession, the probability we get exactly 5 numbers that meet our criteria is 0.13875.
Fundamental Principle of Counting, also called the counting rule, is the method to count how many ways multiple independent events can occur.
Thus, by Fundamental Principle of Counting, the number of possible even integers that start with 2 odd digits is 13875.
= (5 x 5 x 5) + (5 x 5 x 10 x 5) + (5 x 5 x 10 x 10 x 5)
= 125 + 1250 + 12500
= 13875
Probability is defined as the likeliness of an event to occur. The probability of any event to occur ranges from 0 to 1, and the sum of all the probabilities of all the events happening is 1.
probability = desired outcome / total outcomes
probability = 13875/100000
probability = 0.13875
Learn more about probability here: brainly.com/question/6649771
#SPJ4
the probability that a marksman will hit a target each time he shoots is 0.89. if he fires 15 times, what is the probability that he hits the target at most 13 times?
The probability that the marksman hits the target at most 13 times is 11.57.
Define binomial probability.
The likelihood of precisely x successes on n further trials in an experiment with two possible outcomes is known as a binomial probability (commonly called a binomial experiment). A random variable's binomial probability is indicated by the notation X B(n, p) (where the prefix stands for "has distribution..."). The distribution's parameters are known as n and p.
The binomial probability is nCx⋅px⋅(1−p)n−x when the probability of success on a given trial is p. In this case, nCx denotes the number of various combinations of x objects chosen from a set of n objects.
Solution Explained:
Given,
P(HT) = 0.89
so if we multiply the chances of hitting he target with 13, we get
P(H13) = 0.89 X 13 = 11.57
To learn more about binomial probability, use the link given
https://brainly.com/question/27371958
#SPJ4
the sample space contains 5 as and 7 bs. what is the probability that a randomly selected set of 2 will in- clude 1 a and 1 b?
the probability that a randomly selected set of 2 will include 1 a and 1 b is 35/66
What is probability?The probability is equal to the variety of possible outcomes. the total number of outcomes that could occur. For instance, there is only one way to get a head and there are a total of two possible outcomes, so the probability of flipping a coin and getting heads is 1 in 2. Writing P(heads) = 12
What are the 4 types of probability?Classical
Empirical
Subjective.
Axiomatic
There are 66 equally likely outcomes, or C(5+7,2) =C(12,2)=66 possible outcomes. Only C(5,1)*C(7,1)=35 of these contain 1A and 1B. thus, the likelihood is 35/66.
The value of the solution is 35/66
To know more about probability click the following link:-
https://brainly.com/question/24756209
#SPJ4
4x+16=-12
What’s the answer?
Answer:
x = -7
Step-by-step explanation:
4x + 16 = -12 Subtract 16 from both sides
4x = -28 Divide both sides by 4
x = -7
Answer:
x = -7
Step-by-step explanation:
1. Subtract 16 from both sides
4x + 16 = -12
4x + 16 - 16 = -12 -16
2. Simplify
Subtract the numbers:
4x + 16 - 16 = -12 - 16
4x = -12 - 16
Subtract the numbers:
4x = -12 - 16
4x = -28
3. Divide both sides by the same factor
4x = -28
[tex]\frac{4x}{4}[/tex] = [tex]\frac{-28}{4}[/tex]
4. Simplify
Cancel terms that are in both the numerator and denominator:
[tex]\frac{4x}{4}[/tex] = [tex]\frac{-28}{4}[/tex]
x = [tex]\frac{-28}{4}[/tex]
Divide the numbers:
x = [tex]\frac{-28}{4}[/tex]
x = -7
Solution:
x = -7
May I have Brainliest please? My next rank will be the highest one: A GENIUS! Please help me on this journey to become top of the ranks! I only need 5 more brainliest to become a genius! I would really appreciate it, and it would make my day! Thank you so much, and have a wonderful rest of your day!
in the past, 75% of the tourists who visited chattanooga went to see rock city. the management of rock city recently undertook an extensive promotional campaign. they are interested in determining whether the promotional campaign actually increased the proportion of tourists visiting rock city. the correct set of hypotheses is
the alternative hypothesis will state that the proportion is not significantly different than 0.75.
This should be researched with a hypothesis test on the proportion of tourists visiting Rock City.
The claim that want to be tested is if the proportion has increased from the past proportion (π=0.75).
Then, the alternative hypothesis will state that the proportion is significantly higher than 0.75.
On the contrary, the alternative hypothesis will state that the proportion is not significantly different than 0.75.
learn more about of hypothesis here
https://brainly.com/question/17002720
#SPJ4
Solve: 3 2/4 + 5 4/11 = ___
Answer: 195/22 or 8[tex]\frac{19}{22}[/tex]
Step-by-step explanation: