Question 1

____________________ is the appropriate test to use when comparing the means of three or more groups to see if they are significantly different from one another.

Accepted Answer

The answer of ____________________ is the appropriate test to use...

Question 2

The degrees of freedom are calculated asd.f.= n - 1 when using the t-test for comparing two means.

Accepted Answer

A) True 
 B)False

Question 3

A Z-test for differences of proportions requires a sample size greater than 100.

Accepted Answer

A) True 
 B)False

Question 4

A t-test is not appropriate and should not be used when the sample size is greater than 30.

Accepted Answer

A) True 
 B)False

Question 5

A researcher hypothesizes that males and females differ with respect to attitude toward sports sponsorships.To investigate this hypothesis that these two groups' attitudes differ,he will use a:

Accepted Answer

A) bivariate test of differences 
B) univariate test of differences 
C) multivariate test of differences 
D) cluster analysis

Question 6

Which of the following is the sum of differences between the group mean and the grand mean summed over all groups for a given set of observations?

Accepted Answer

A) between-groups variance 
B) total error variance 
C) F-statistic 
D) χ² value

Question 7

The F-test partitions total variance into ____________________ variance and ____________________ variance.

Accepted Answer

The answer of The F-test partitions total variance into ____________________...

Question 8

If 25 of the 35 females in a research study agree with a statement,and 15 of the 35 males agree with this statement,the expected value for males-agree is:

Accepted Answer

A) 15 
B) 20 
C) 25 
D) 35

Question 9

The mean of a variable over all observations is called the:

Accepted Answer

A) master mean 
B) average mean 
C) grand mean 
D) ANOVA mean

Question 10

In an ANOVA test of the differences between the means of three groups,the null hypothesis is:

Accepted Answer

A)  $ \mu_{1}=\mu_{2}=\mu_{3} $ 
B)  $ \mu_{1} \neq \mu_{2} \neq \mu_{3} $ 
C)  $ \mu_{1}-\mu_{2}-\mu_{3}=0 $ 
D)  $ \mu_{1}+\mu_{2}+\mu_{3}=1 $

Question 11

Which test is appropriate for comparing the scores of two interval variables drawn from related populations?

Accepted Answer

A) ANOVA 
B) relative t-test 
C) relative x² test 
D) pair-samples t-test

Question 12

If a researcher is interested in whether adult males purchase a product more frequently than adult females,this is an example of univariate statistics.

Accepted Answer

A) True 
 B)False

Question 13

What is ANOVA and when is it the appropriate statistical technique? What test is used to determine significance?

Accepted Answer

The answer of What is ANOVA and when is it...

Question 14

When no direction of a relationship is stated in the hypothesis,a one-tailed test is appropriate.

Accepted Answer

A) True 
 B)False

Question 15

The chi-square test requires that the expected frequency in each cell of the contingency table be at least 30.

Accepted Answer

A) True 
 B)False

Question 16

If the critical value of chi-square in the chi-square table is 3.84,and the obtained value of chi-square in the study is 3.45,the researcher should:

Accepted Answer

A) reject the null hypothesis 
B) accept the null hypothesis 
C) accept the research hypothesis 
D) reject both the null and the research hypotheses

Question 17

Suppose that you used a 9-point rating scale and that you wanted to compare men who had an annual income over $50,000 (Group 1)with men who had an annual income less than or equal to $50,000 (Group 2)on their liking of a new product.If you studied 40 men in Group 1 and they have a mean of 7 and a standard deviation of 2.5,while the 35 men in Group 2 have a mean of 5 and a standard deviation of 1.4,what is the approximate value of t using the t-test?

Accepted Answer

A) 3.43 
B) 4.19 
C) 2.64 
D) not enough information to determine

Question 18

In using the Z-test for comparing two proportions,if the pooled estimate of the proportion of successes is 0.36,then the pooled estimate of proportion of failures is:

Accepted Answer

A) 1 
B) 0.36 
C) 0.64 
D) 0.13

Question 19

The sum of differences between the group mean and the grand mean summed over all groups for a given set of observations is called ____________________.

Accepted Answer

The answer of The sum of differences between the group...

Question 20

The F-test partitions the total variance into within-group variance and between-group variance.

Accepted Answer

A) True 
 B)False

Exam 22: Bivariate Statistical Analysis: Differences Between Two Variables

____________________ is the appropriate test to use when comparing the means of three or more groups to see if they are significantly different from one another.

The degrees of freedom are calculated asd.f.= n - 1 when using the t-test for comparing two means.

A Z-test for differences of proportions requires a sample size greater than 100.

A t-test is not appropriate and should not be used when the sample size is greater than 30.

A researcher hypothesizes that males and females differ with respect to attitude toward sports sponsorships.To investigate this hypothesis that these two groups' attitudes differ,he will use a:

Which of the following is the sum of differences between the group mean and the grand mean summed over all groups for a given set of observations?

The F-test partitions total variance into variance and variance.

If 25 of the 35 females in a research study agree with a statement,and 15 of the 35 males agree with this statement,the expected value for males-agree is:

The mean of a variable over all observations is called the:

In an ANOVA test of the differences between the means of three groups,the null hypothesis is:

Which test is appropriate for comparing the scores of two interval variables drawn from related populations?

If a researcher is interested in whether adult males purchase a product more frequently than adult females,this is an example of univariate statistics.

What is ANOVA and when is it the appropriate statistical technique? What test is used to determine significance?

When no direction of a relationship is stated in the hypothesis,a one-tailed test is appropriate.

The chi-square test requires that the expected frequency in each cell of the contingency table be at least 30.

If the critical value of chi-square in the chi-square table is 3.84,and the obtained value of chi-square in the study is 3.45,the researcher should:

In using the Z-test for comparing two proportions,if the pooled estimate of the proportion of successes is 0.36,then the pooled estimate of proportion of failures is:

The sum of differences between the group mean and the grand mean summed over all groups for a given set of observations is called ____________________.

The F-test partitions the total variance into within-group variance and between-group variance.