Question 1

A researcher conducts two studies on child health.In Study 1,30 children consume either a low-,moderate-,or high-fat meal (n = 10 per group).In Study 2,the researcher conducts the same study,except that a No Meal control group is added,with n = 10 in each group.If Fobt = 3.11 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 2

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 3

There are two sources of variation in a one-way between-subjects ANOVA: one attributed to differences between groups and one attributed to error.

Accepted Answer

A) True 
 B)False

Question 4

A mean square is a sample variance.

Accepted Answer

A) True 
 B)False

Question 5

Violating the assumption of homogeneity of variance tends to increase the likelihood of committing a Type I error.

Accepted Answer

A) True 
 B)False

Question 6

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 Fobt = 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 7

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

Accepted Answer

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

Question 8

A researcher has the same 18 participants rate 6 pictures (k = 6),each depicting a person with a different body type.The one-way between-subjects ANOVA is the most appropriate test for this design.

Accepted Answer

A) True 
 B)False

Question 9

A researcher measures attractiveness ratings of a male confederate among 30 women who were told the confederate was either single,dating,or married (n = 10 per group).What are the degrees of freedom for error for the one-way between-subjects ANOVA?

Accepted Answer

A)  2 
B)  3 
C)  27 
D)  28

Question 10

Using a between-subjects ANOVA design,______.

Accepted Answer

A)  n-k participants are each observed one time 
B)  n participants are observed k times 
C)  data are not analyzed between groups 
D)  the same participants are observed in each group

Question 11

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

Accepted Answer

A) True 
 B)False

Question 12

The degrees of freedom for the between-groups variability are called ______.

Accepted Answer

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

Question 13

A lowercase k is used to denote ______ using a one-way ANOVA.

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)  the number of groups in a study and the number of levels of the factor in a study

Question 14

A "one-way" between-subjects ANOVA is conducted when data are recorded in one group.

Accepted Answer

A) True 
 B)False

Question 15

A researcher conducts two studies using the one-way between-subjects ANOVA.The sum of squares between groups is larger in Study 1 than in Study 2; the sum of squares total is smaller in Study 1 than in Study 2.Using $\eta$2,in which study will the effect size be larger?

Accepted Answer

A)  Study 1 
B)  Study 2 
C)  there is not enough information to answer this question

Question 16

What is the minimum number of groups that can be observed using the one-way between-subjects ANOVA design?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4

Question 17

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)  a two-independent-sample t test and a one-way between-subjects ANOVA

Question 18

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 19

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

Accepted Answer

A) True 
 B)False

Question 20

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

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

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.)

There are two sources of variation in a one-way between-subjects ANOVA: one attributed to differences between groups and one attributed to error.

A mean square is a sample variance.

Violating the assumption of homogeneity of variance tends to increase the likelihood of committing a Type I error.

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

A researcher has the same 18 participants rate 6 pictures (k = 6),each depicting a person with a different body type.The one-way between-subjects ANOVA is the most appropriate test for this design.

A researcher measures attractiveness ratings of a male confederate among 30 women who were told the confederate was either single,dating,or married (n = 10 per group) .What are the degrees of freedom for error for the one-way between-subjects ANOVA?

Using a between-subjects ANOVA design,______.

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

The degrees of freedom for the between-groups variability are called ______.

A lowercase k is used to denote ______ using a one-way ANOVA.

A "one-way" between-subjects ANOVA is conducted when data are recorded in one group.

A researcher conducts two studies using the one-way between-subjects ANOVA.The sum of squares between groups is larger in Study 1 than in Study 2; the sum of squares total is smaller in Study 1 than in Study 2.Using $\eta$ ²,in which study will the effect size be larger?

What is the minimum number of groups that can be observed using the one-way between-subjects ANOVA design?

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?

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?

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

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

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

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.)

There are two sources of variation in a one-way between-subjects ANOVA: one attributed to differences between groups and one attributed to error.

A mean square is a sample variance.

Violating the assumption of homogeneity of variance tends to increase the likelihood of committing a Type I error.

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

A researcher has the same 18 participants rate 6 pictures (k = 6),each depicting a person with a different body type.The one-way between-subjects ANOVA is the most appropriate test for this design.

A researcher measures attractiveness ratings of a male confederate among 30 women who were told the confederate was either single,dating,or married (n = 10 per group) .What are the degrees of freedom for error for the one-way between-subjects ANOVA?

Using a between-subjects ANOVA design,______.

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

The degrees of freedom for the between-groups variability are called ______.

A lowercase k is used to denote ______ using a one-way ANOVA.

A "one-way" between-subjects ANOVA is conducted when data are recorded in one group.

A researcher conducts two studies using the one-way between-subjects ANOVA.The sum of squares between groups is larger in Study 1 than in Study 2; the sum of squares total is smaller in Study 1 than in Study 2.Using η\etaη 2,in which study will the effect size be larger?

What is the minimum number of groups that can be observed using the one-way between-subjects ANOVA design?

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?

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?

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

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

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

A researcher conducts two studies using the one-way between-subjects ANOVA.The sum of squares between groups is larger in Study 1 than in Study 2; the sum of squares total is smaller in Study 1 than in Study 2.Using $\eta$ ²,in which study will the effect size be larger?