Question 1

The term "between-subjects" refers to

Accepted Answer

A) observing the same participants in each group 
B) observing different participants one time in each group 
C) the type of post hoc test conducted 
D) the type of effect size estimate measured

Question 2

How does omega-squared for the one-way between-subjects ANOVA correct for the fact that eta-squared tends to be a biased estimate of effect size?

Accepted Answer

A) It corrects for the size of error by including  In the formula. 
B) It includes the degrees of freedom between groups (  )in the formula. 
C) It accounts for the number of groups that were observed. 
D) all of the above

Question 3

Which of the following statements is the appropriate way to read the degrees of freedom for an ANOVA with 10 participants in each of four groups?

Accepted Answer

A) 3 or 36 degrees of freedom 
B) 3 and 36 degrees of freedom 
C) 4 and 10 degrees of freedom 
D) 4 and 36 degrees of freedom

Question 4

A researcher measures differences in romantic feelings among adolescent and adult males.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 5

The degrees of freedom for the between-groups variability is called

Accepted Answer

A) degrees of freedom numerator 
B) degrees of freedom denominator 
C) degrees of freedom between-groups 
D) both A and C

Question 6

A significant ANOVA indicates that all pairs of group means significantly differ.

Accepted Answer

A) True 
 B)False

Question 7

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 8

Computing a one-way between-subjects ANOVA is appropriate when

Accepted Answer

A) different participants are observed one time in each of two or more groups for one factor 
B) the same participants are observed in each of two or more groups for one factor 
C) the levels of one or more factors are manipulated 
D) all of the above

Question 9

Homogeneity of variance is an assumption for the one-way between-subjects ANOVA.What does this assumption mean?

Accepted Answer

A) that the population being sampled from is normally distributed 
B) that participants are randomly selected to participate in a sample 
C) that the variance is equal in each population from which samples are selected 
D) that one observation has no effect on the likelihood of another observation

Question 10

A researcher divides participants into groups that will engage in low,moderate,or intense levels of exercise.The total calories consumed by participants following the exercise are then recorded.What type of statistical design is appropriate for this study?

Accepted Answer

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

Question 11

A "one-way" ANOVA is associated with one degree of freedom.

Accepted Answer

A) True 
 B)False

Question 12

Without changing the value of error variance,the ________ the between-groups variability,the more likely we are to retain the null hypothesis.

Accepted Answer

A) larger 
B) smaller

Question 13

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 14

A researcher measures differences in recall between male and female participants following a romantic movie clip.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 15

When the variability attributed to between-groups is equal to the variability attributed to error,then the value of the test statistic for a one-way between-subjects ANOVA is,

Accepted Answer

A) Equal to 0. 
B) Equal to 1. 
C) Significant at any sample size. 
D) Undefined in that the test statistic cannot be computed in this case.

Question 16

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.

Question 17

In a study with three groups and 13 participants in each group,the sum of squares for the within-groups source of variation is 18.What is the value for the mean square within-groups in this study?

Accepted Answer

A) 2 
B) 3 
C) 9 
D) 0.5

Question 18

To summarize the results of a one-way between-subjects ANOVA test,we report the test statistic,the degrees of freedom,and the p value.

Accepted Answer

A) True 
 B)False

Question 19

A researcher assigns 21 adolescents to rate the likability of a person described in a vignette as having one of three personality traits.An equal number of participants are assigned to each group.If  = 4.08 for this study,then what was the decision at a .05 level of significance for a one-way between-subjects ANOVA?

Accepted Answer

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

Question 20

A one-way between-subjects ANOVA is conducted to test for mean differences between the levels of two or more factors.

Accepted Answer

A) True 
 B)False

Exam 12: Analysis of Variance: One-Way Between-Subjects Design

The term "between-subjects" refers to

How does omega-squared for the one-way between-subjects ANOVA correct for the fact that eta-squared tends to be a biased estimate of effect size?

Which of the following statements is the appropriate way to read the degrees of freedom for an ANOVA with 10 participants in each of four groups?

A researcher measures differences in romantic feelings among adolescent and adult males.If different participants were in each group,then what type of statistical design is appropriate for this study?

The degrees of freedom for the between-groups variability is called

A significant ANOVA indicates that all pairs of group means significantly differ.

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.

Computing a one-way between-subjects ANOVA is appropriate when

Homogeneity of variance is an assumption for the one-way between-subjects ANOVA.What does this assumption mean?

A researcher divides participants into groups that will engage in low,moderate,or intense levels of exercise.The total calories consumed by participants following the exercise are then recorded.What type of statistical design is appropriate for this study?

A "one-way" ANOVA is associated with one degree of freedom.

Without changing the value of error variance,the ________ the between-groups variability,the more likely we are to retain the null hypothesis.

A researcher measures differences in recall between male and female participants following a romantic movie clip.If different participants were in each group,then what type of statistical design is appropriate for this study?

When the variability attributed to between-groups is equal to the variability attributed to error,then the value of the test statistic for a one-way between-subjects ANOVA is,

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. )

In a study with three groups and 13 participants in each group,the sum of squares for the within-groups source of variation is 18.What is the value for the mean square within-groups in this study?

To summarize the results of a one-way between-subjects ANOVA test,we report the test statistic,the degrees of freedom,and the p value.

A one-way between-subjects ANOVA is conducted to test for mean differences between the levels of two or more factors.