Question 11(5 points)

The following output from MINITAB presents the results of a hypothesis test.

What is theP-value?

Question 11 options:

1.968656

46.10

0.014319

2.449164

Question 12(5 points)

In a simple random sample of 77 families, the mean number of children is 2.2 with a standard deviation of 0.9. You wish to determine if the population mean differs from 2.1 children per family.

Determine the type of parameter to be tested and compute the test statistic.

Question 12 options:

Test for a standard deviation; test statistic 454.1235

Test for a proportion; test statistic 2.9250

z-test for the mean; test statistic 0.9750

t-test for the mean; test statistic 0.9750

Question 13(5 points)

The following display from a TI-84 Plus calculator presents the results of a hypothesis test.

What are the null and alternate hypotheses?

Question 13 options:

H₀:= 43, H₁: 43

H₀:= 43, H₁:= 44.96

H₀: 44.96 H₁:= 44.96

H₀: 43, H₁:= 43

Question 14(5 points)

A sample of 43 students enroll in a program that claims to improve scores on the quantitative reasoning portion of the Graduate Record Examination (GRE). The participants take a mock GRE test before the program begins and again at the end to measure their improvement.

The mean number of points improved was.Assume the standard deviation isand letbe the population mean number of points improved. To determine whether the program is effective, a test is made of the hypothesesversus.

Using technology, compute theP-value.

Question 14 options:

0.019996526

0.079986104

1.405165398

0.039993052

Question 15(5 points)

The following display from a TI-84 Plus calculator presents the results of a hypothesis test.

What is the value of the test statistic?

Question 15 options:

60

-2.527972

57.40

1.988528

Question 16(5 points)

A test ofversusis performed using a significance level of. The value of the test statistic is. IsH₀rejected?

Question 16 options:

It cannot be determined.

Yes

No

Question 17(5 points)

A test ofversusis performed using a significance level of. The value of the test statistic is.

If the true value ofis 58, does the conclusion result in a TypeI error, a TypeII error, or a correct decision?

Question 17 options:

Type I error

Type II error

Correct decision

Question 18(5 points)

The following display from a TI-84 Plus calculator presents the results of a hypothesis test for a population mean.

Do you rejectH₀at thelevel of significance?

Question 18 options:

No

Yes

Question 19(5 points)

A fleet of rental cars - all the same make, model, and year - has a mean fuel efficiency of 25 miles per gallon (mpg). A random sample of 57 cars are selected and the air filter of each is replaced with a new one. Let be the population mean fuel efficiency score that would occur if every car's air filter were replaced. The air filter change is deemed effective if. A test is made ofversus. Consider these possible conclusions:

i). The air filter changes are effective.

ii). The air filter changes are not effective.

iii). The air filter changes might not be effective.

Which of the three conclusions is best ifH₀is not rejected?

Question 19 options:

i

iii

ii

Question 20(5 points)

A psychologist is designing an experiment in which rats will navigate a maze. Ten rats run the maze, and the time it takes for each to complete the maze is recorded. The results are as follows:

62.660.442.867.763.5

65.959.565.862.451.0Following is a boxplot for the data. Is it reasonable to assume the conditions for performing a hypothesis test are satisfied?

Question 20 options:

No

Yes