Question 1

What is the assumption that the amount of variability in each of the two groups is equal?

Accepted Answer

A) heterogeneity of variances 
B) homogeneity of variance 
C) equality of variance 
D) stability of variance 
A) heterogeneity of variances 
B) homogeneity of variance 
C) equality of variance 
D) stability of variance

Question 2

In order to determine whether or not you will reject the null hypothesis, the test statistic must be compared against the _______.

Accepted Answer

A) critical value 
B) significance level 
C) obtained value 
D) p value 
A) critical value 
B) significance level 
C) obtained value 
D) p value

Question 3

There is an important difference between a significant result and a meaningful result.

Accepted Answer

A) True 
 B)False

Question 4

What does the number 2.001 represent in the following: t₍₅₈₎ = 2.001, p < .05?

Accepted Answer

A) test statistic 
B) t value 
C) degrees of freedom 
D) significance level 
A) test statistic 
B) t value 
C) degrees of freedom 
D) significance level

Question 5

If the effect size is .37, what is your interpretation of the group difference?

Accepted Answer

A) weak 
B) small 
C) medium 
D) large 
A) weak 
B) small 
C) medium 
D) large

Question 6

The test statistic calculated by the statistical procedure selected is known as the _______.

Accepted Answer

A) critical value 
B) significance level 
C) obtained value 
D) p value 
A) critical value 
B) significance level 
C) obtained value 
D) p value

Question 7

If there is significant difference between the distributions of scores in two groups with effect size at .37, how big are the differences between the two groups?

Accepted Answer

A) no 
B) small 
C) medium 
D) large 
A) no 
B) small 
C) medium 
D) large

Question 8

The t-test for independent means is used when each group is tested _______.

Accepted Answer

A) only once 
B) only twice 
C) once or twice 
D) any number of times 
A) only once 
B) only twice 
C) once or twice 
D) any number of times

Question 9

What does t₍₄₇₎ = .23 mean?

Accepted Answer

In the above statement, t repr

Question 10

If the obtained value is less than the critical value, what should you do?

Accepted Answer

A) reject the null hypothesis 
B) accept the null hypothesis 
C) set a higher p value 
D) increase the sample 
A) reject the null hypothesis 
B) accept the null hypothesis 
C) set a higher p value 
D) increase the sample

Question 11

When examining group difference where no direction of the difference is specified, which of the following is used?

Accepted Answer

A) two-tailed test 
B) one-tailed test 
C) directional hypothesis 
D) critical value 
A) two-tailed test 
B) one-tailed test 
C) directional hypothesis 
D) critical value

Question 12

What does the number 58 represent in the following: t₍₅₈₎ = 2.001, p < .05?

Accepted Answer

A) Test statistic 
B) t value 
C) Degrees of freedom 
D) Significance level 
A) Test statistic 
B) t value 
C) Degrees of freedom 
D) Significance level

Question 13

When it comes to significance testing in social science, which level of risk is most commonly used?

Accepted Answer

A) .05 
B) .01 
C) .001 
D) .10 
A) .05 
B) .01 
C) .001 
D) .10

Question 14

In the formula that computes a t value, what does represent?

Accepted Answer

A) the number of participants in Group 1 
B) the variance for Group 1 
C) the mean for Group 1 
D) the standard deviation for Group 1 
A) the number of participants in Group 1 
B) the variance for Group 1 
C) the mean for Group 1 
D) the standard deviation for Group 1

Question 15

The t-test for independent samples should be used when participants are tested multiple times.

Accepted Answer

A) True 
 B)False

Question 16

What does the letter t represent in the following: t₍₅₈₎ = 2.001, p < .05?

Accepted Answer

A) test statistic 
B) t value 
C) degrees of freedom 
D) significance level 
A) test statistic 
B) t value 
C) degrees of freedom 
D) significance level

Question 17

What does the number .05 represent in the following: t₍₅₈₎ = 2.001, p < .05?

Accepted Answer

A) test statistic 
B) t value 
C) degrees of freedom 
D) significance level 
A) test statistic 
B) t value 
C) degrees of freedom 
D) significance level

Question 18

A measure of how different two groups are from one another in their magnitude is the _______.

Accepted Answer

A) error size 
B) significance level 
C) effect size 
D) mean score 
A) error size 
B) significance level 
C) effect size 
D) mean score

Question 19

If you want to examine the difference among the average scores of three unrelated groups, which of the following statistical techniques should you select?

Accepted Answer

A) regression 
B) dependent-samples t-test 
C) analysis of variance 
D) independent-samples t-test 
A) regression 
B) dependent-samples t-test 
C) analysis of variance 
D) independent-samples t-test

Question 20

Which major assumption of the t-test deals with the amount of variability in each group?

Accepted Answer

A) variables normally distributed 
B) sample chosen at random 
C) scores are independent 
D) variances are equal 
A) variables normally distributed 
B) sample chosen at random 
C) scores are independent 
D) variances are equal

Exam 11: Tea for Two: Tests Between the Means of Different Groups

What is the assumption that the amount of variability in each of the two groups is equal?

In order to determine whether or not you will reject the null hypothesis, the test statistic must be compared against the _______.

There is an important difference between a significant result and a meaningful result.

What does the number 2.001 represent in the following: t₍₅₈₎ = 2.001, p < .05?

If the effect size is .37, what is your interpretation of the group difference?

The test statistic calculated by the statistical procedure selected is known as the _______.

If there is significant difference between the distributions of scores in two groups with effect size at .37, how big are the differences between the two groups?

The t-test for independent means is used when each group is tested _______.

What does t₍₄₇₎ = .23 mean?

If the obtained value is less than the critical value, what should you do?

When examining group difference where no direction of the difference is specified, which of the following is used?

What does the number 58 represent in the following: t₍₅₈₎ = 2.001, p < .05?

When it comes to significance testing in social science, which level of risk is most commonly used?

In the formula that computes a t value, what does represent?

The t-test for independent samples should be used when participants are tested multiple times.

What does the letter t represent in the following: t₍₅₈₎ = 2.001, p < .05?

What does the number .05 represent in the following: t₍₅₈₎ = 2.001, p < .05?

A measure of how different two groups are from one another in their magnitude is the _______.

If you want to examine the difference among the average scores of three unrelated groups, which of the following statistical techniques should you select?

Which major assumption of the t-test deals with the amount of variability in each group?

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