Question 1

Unlike omega-squared,the formula for eta-squared corrects for the number of groups and the size of error in its estimate of effect size.

Accepted Answer

A) True 
 B)False

Question 2

The same participants are observed in each group using the between-subjects design.

Accepted Answer

A) True 
 B)False

Question 3

In a study with four groups and 10 participants in each group,the sum of squares for the between-groups source of variation is 60.What is the value for the mean square between-groups in this study?

Accepted Answer

A) 10 
B) 15 
C) 20 
D) 1.67

Question 4

A researcher conducts a study in which k = 6 and n = 6 per group.What are the critical values for the one-way between-subjects ANOVA at a .05 level of significance?

Accepted Answer

A) 3.70 
B) 3.47 
C) 2.53 
D) 2.42

Question 5

A researcher conducts two studies on self-perception.In Study 1,24 participants rate how positively they view themselves (on a 5-point scale)in one of three groups (n = 8 per group).In Study 2,the researcher conducts a similar study,except that k = 3 and n = 8.If  = 28 and  = 42 in both studies,then in which study will the decision be to reject the null hypothesis at a .05 level of significance for a one-way between-subjects ANOVA?

Accepted Answer

A) Study 1 
B) Study 2 
C) both 
D) none

Question 6

The following is a summary of a one-way between-subjects ANOVA: F(2,37)= 3.42,p < .05,  = .12.How many participants were observed in this study?

Accepted Answer

A) 12 
B) 37 
C) 40 
D) 39

Question 7

A professor compared differences in class grades between students in their freshman,sophomore,junior,and senior years of college.If different participants were in each group,then what type of statistical design is appropriate for this study?

Accepted Answer

A) a two-independent sample t test 
B) a one-way between-subjects ANOVA 
C) a two-way between-subjects ANOVA 
D) both A and B

Question 8

A lowercase k is used to denote

Accepted Answer

A) the number of groups in a study 
B) the number of participants in a study 
C) the number of levels of the factor in a study 
D) both A and C

Question 9

A researcher randomly assigns 24 participants to one of four groups.At a .05 level of significance,the critical value for a one-way between-subjects ANOVA is 3.49.

Accepted Answer

A) True 
 B)False

Question 10

A researcher conducts a study using the one-way between-subjects ANOVA.He computes  = 120 and  = 200.What is the effect size for this test using eta-squared?

Accepted Answer

A) 0.60 
B) 0.38 
C) 1.67 
D) There is not enough information to answer this question.

Question 11

Eta-squared is often reported as  for an analysis of variance test.

Accepted Answer

A) True 
 B)False

Question 12

Post hoc tests are conducted following a significant one-way between-subjects ANOVA,only when k > 2.

Accepted Answer

A) True 
 B)False

Question 13

The degrees of freedom for a one-way between-subjects ANOVA is the sample size minus one.

Accepted Answer

A) True 
 B)False

Question 14

The following is a summary of a one-way between-subjects ANOVA: F(2,37)= 3.42,p < .05,  = .12.How many pairwise comparisons need to be made for this ANOVA result?

Accepted Answer

A) 2 
B) 3 
C) 4 
D) 12

Question 15

Which of the following is a measure of proportion of variance for a one-way between-subjects ANOVA?

Accepted Answer

A) eta-squared 
B) omega-squared 
C) estimated Cohen's d 
D) both A and B

Question 16

Two measures of proportion of variance for the one-way between-subjects ANOVA are eta-squared and omega-squared.

Accepted Answer

A) True 
 B)False

Question 17

A researcher computes the following one-way between-subjects ANOVA table.State the decision at a .05 level of significance.(Hint: Complete the table first. )

Accepted Answer

A) Reject the null hypothesis. 
B) Retain the null hypothesis. 
C) There is not enough information to answer this question.

Question 18

A researcher assigned participants (n = 8 per group)to read vignettes describing a person engaging in either a helpful,hurtful,or neutral act.Different participants were assigned to each group and asked to rate how positively they viewed the person described in the vignette.What is the critical value for the one-way between-subjects ANOVA at a .05 level of significance?

Accepted Answer

A) 3.07 
B) 3.44 
C) 3.47 
D) 4.32

Question 19

To conduct a one-way between-subjects ANOVA,we assume that the samples were randomly selected from populations with equal variances,and that participants were independently observed in each group.

Accepted Answer

A) True 
 B)False

Question 20

A researcher computes the following one-way between-subjects ANOVA table for a study where k = 3 and n = 12.State the decision at a .05 level of significance.(Hint: Complete the table first. )

Accepted Answer

A) Reject the null hypothesis. 
B) Retain the null hypothesis. 
C) There is not enough information to answer this question.

Exam 12: Two-Way Analysis of Variance: Between-Subjects Factorial Design

Unlike omega-squared,the formula for eta-squared corrects for the number of groups and the size of error in its estimate of effect size.

The same participants are observed in each group using the between-subjects design.

In a study with four groups and 10 participants in each group,the sum of squares for the between-groups source of variation is 60.What is the value for the mean square between-groups in this study?

A researcher conducts a study in which k = 6 and n = 6 per group.What are the critical values for the one-way between-subjects ANOVA at a .05 level of significance?

The following is a summary of a one-way between-subjects ANOVA: F(2,37) = 3.42,p < .05, = .12.How many participants were observed in this study?

A professor compared differences in class grades between students in their freshman,sophomore,junior,and senior years of college.If different participants were in each group,then what type of statistical design is appropriate for this study?

A lowercase k is used to denote

A researcher randomly assigns 24 participants to one of four groups.At a .05 level of significance,the critical value for a one-way between-subjects ANOVA is 3.49.

A researcher conducts a study using the one-way between-subjects ANOVA.He computes = 120 and = 200.What is the effect size for this test using eta-squared?

Eta-squared is often reported as for an analysis of variance test.

Post hoc tests are conducted following a significant one-way between-subjects ANOVA,only when k > 2.

The degrees of freedom for a one-way between-subjects ANOVA is the sample size minus one.

The following is a summary of a one-way between-subjects ANOVA: F(2,37) = 3.42,p < .05, = .12.How many pairwise comparisons need to be made for this ANOVA result?

Which of the following is a measure of proportion of variance for a one-way between-subjects ANOVA?

Two measures of proportion of variance for the one-way between-subjects ANOVA are eta-squared and omega-squared.

A researcher computes the following one-way between-subjects ANOVA table.State the decision at a .05 level of significance.(Hint: Complete the table first. )

To conduct a one-way between-subjects ANOVA,we assume that the samples were randomly selected from populations with equal variances,and that participants were independently observed in each group.

A researcher computes the following one-way between-subjects ANOVA table for a study where k = 3 and n = 12.State the decision at a .05 level of significance.(Hint: Complete the table first. )