Question 1:

The single-samplettest should be used when comparing a sample mean to a population mean and when __________.

A.the population standard deviation is not known

B.the population standard deviation is known

C.the effect size is very small

D.the effect size is very large

QUESTION 2

When using thezfor a sample mean you can compute the standard error of the mean, but when using atfor a sample mean, you must estimate the standard error of the mean.

A.False

B.True

QUESTION 3

Compute the degrees of freedom (df)for a single-sample t test is the sample size is N = 50.

A.48

B.51

C.49

D.50

QUESTION 4

Locate thetcritical value for a sample of N = 50, with alpha set at = .05 in the right tail.

A.1.6766

B.1.6753

C.1.65

D.1.96

QUESTION 5

Aztest and attest will have different critical regions because __________.

A. zcritical values differ based on the sample size.

B. zcritical values differ based on the sample standard deviation.

C. tcritical values differ based on the sample size.

D. tcritical values differ based on the sample standard deviation.

QUESTION 6

The results of a single-sample t test are reported ast(44) = -3.35,p< .001,d= 0.50.If the alpha level is set at .05 in the left tail, what is the correct decision to make regarding the null hypothesis?

A. Fail to reject the null hypothesis

B. Reject the null hypothesis

QUESTION 7

The results of a single-sample t test are reported ast(44) = -3.35,p< .001,d= 0.50.Describe the effect size for this study.

A.medium to large

B.large

C.small

D.medium

E.small to medium

QUESTION 8

A random sample of 40 parents completed a questionnaire about gun safety laws in the United States. Responses ranged from 1 to 5, with 5 indicating more agreement that gun safety laws should be more strict. The general public had a mean of 3.2 and a standard deviation of about 1.22. You were testing whether the mean for the sample of parents (M = 3.8) is different from the population mean. What is the null hypothesis for this study?

QUESTION 9

A random sample of 40 parents completed a questionnaire about gun safety laws in the United States. Responses ranged from 1 to 5, with 5 indicating more agreement that gun safety laws should be more strict. The general public had a mean of 3.2 and a standard deviation of about 1.22. You were testing whether the mean for the sample of parents(M = 3.8) is different from the population mean. What is the research hypothesis for this study?

QUESTION 10

A random sample of 40 parents completed a questionnaire about gun safety laws in the United States. Responses ranged from 1 to 5, with 5 indicating more agreement that gun safety laws should be more strict. The general public had a mean of 3.2 and a standard deviation of about 1.22. You were testing whether the mean for the sample of parents(M = 3.8) is different from the population mean. What are the degrees of freedom (df) for this study?

A.41

B.40

C.39

D.38

QUESTION 11

A random sample of 40 parents completed a questionnaire about gun safety laws in the United States. Responses ranged from 1 to 5, with 5 indicating more agreement that gun safety laws should be more strict. The general public had a mean of 3.2 and a standard deviation of about 1.22. You were testing whether the mean for the sample of parents(M = 3.8) is different from the population mean. Find thetcritical value for an alpha level, = .05.

QUESTION 12

A random sample of 40 parents completed a questionnaire about gun safety laws in the United States. Responses ranged from 1 to 5, with 5 indicating more agreement that gun safety laws should be more strict. The general public had a mean of 3.2 and a standard deviation of about 1.22. You were testing whether the mean for the sample of parents(M = 3.8) is different from the population mean. Compute thettest statistic for this study.

A.2.62

B.3.73

C.0.49

D.3.11

QUESTION 13

A random sample of 40 parents completed a questionnaire about gun safety laws in the United States. Responses ranged from 1 to 5, with 5 indicating more agreement that gun safety laws should be more strict. The general public had a mean of 3.2 and a standard deviation of about 1.22. You were testing whether the mean for the sample of parents(M = 3.8) is different from the population mean. Compute the effect size (d) for this study.

A.2.62

B.0.49

C.3.73

D.3.11

QUESTION 14

A random sample of 40 parents completed a questionnaire about gun safety laws in the United States. Responses ranged from 1 to 5, with 5 indicating more agreement that gun safety laws should be more strict. The general public had a mean of 3.2 and a standard deviation of about 1.22. You were testing whether the mean for the sample of parents(M = 3.8) is different from the population mean.What decision should you make about the null hypothesis for this study?

A.Fail to reject the null hypothesis

B.Reject the null hypothesis

QUESTION 15

A random sample of 40 parents completed a questionnaire about gun safety laws in the United States. Responses ranged from 1 to 5, with 5 indicating more agreement that gun safety laws should be more strict. The general public had a mean of 3.2 and a standard deviation of about 1.22. You were testing whether the mean for the sample of parents(M = 3.8) is different from the population mean.Which of the following best represents the results for this study?

The sample of 40 parents reported significantly higher average agreement scores (M = 3.8) regarding gun laws needing to be stricter versus the general public ( = 3.2), t(39) = 3.11, p < .05,d= 0.49.The average agreement scores on the gun control questionnaire were 0.49 of astandard deviation higher than those of the general population.

B.The sample of 40 parents did not report significantly different average agreement scores (M = 3.8) regarding gun laws needing to be stricter versus the general public ( = 3.2), t(39) = 0.49, p > .05,d=3.73.The average agreement scores on the gun control questionnaire were 3.73 standard deviations higher than those of the general population.

C.The sample of 40 parents reported significantly lower average agreement scores (M = 3.2) regarding gun laws needing to be stricter versus the general public ( = 3.8), t(40) = 3.73, p < .05,d= 2.62.The average agreement scores on the gun control questionnaire were 2.62standard deviations lower than those of the general population.

D.The sample of 40 parents did not report significantly different average agreement scores (M = 3.8) regarding gun laws needing to be stricter versus the general public ( = 3.2), t(38) = 2.62, p > .05,d= 3.11.The average agreement scores on the gun control questionnaire were 3.11 standard deviations higher than those of the general population.