Question 1

To study the effectiveness of possible treatments for insomnia,a sleep researcher conducted a study in which four participants were instructed to count sheep (the Sheep Condition),four were told to concentrate on their breathing (the Breathing Condition),and four were not given any special instructions (the Control Condition).The average number of minutes taken for participants to fall asleep over the next seven days were 39,33,42,and 38 minutes for the Sheep condition; 33,25,31,and 27 minutes for the Breathing condition; and 44,41,38,and 41 for the Control condition.Using the .01 significance level,did the different techniques have different effects?
a.Use the five steps of hypothesis testing.
b.Sketch the distributions involved.
c.Figure the effect size of this study and indicate whether it is nearer to small,medium,or large.
d.Figure a planned contrast between the means for those in the Sheep Condition versus those in the Breathing Condition using the .05 significance level.
e.Conduct Scheffé's test for the groups in (d)and indicate the F cutoff,the F you would use for the comparison,and the hypothesis-testing decision (reject or do not reject).
f.Explain the logic of what you did to a person who is familiar with the t test for independent means,but who knows nothing about the analysis of variance.(Be sure your explanation includes the logic of comparing within-groups to between-groups population variance estimates,the logic of how each of these is figured,the F distribution,and the F table.)

Accepted Answer

The answer of To study the effectiveness of possible treatments...

Question 2

based on the following tables. -Advanced topic: SS_Total = __________.(Give a number.)

Accepted Answer

The answer of based on the following tables. -Advanced topic: SS_Total...

Question 3

based on the following tables. -Advanced topic: SS_Within = __________.(Give a number.)

Accepted Answer

The answer of based on the following tables. -Advanced topic: SS_Within...

Question 4

based on the following tables.

-Advanced topic: Complete the ANOVA summary table,replacing the letters (a)to (i)with the appropriate number.

Accepted Answer

The answer of based on the following tables.

-Advanced topic: Complete...

Question 5

Prior to eating breakfast,25 participants were randomly assigned to eat a large meal,25 to eat a small meal,and 25 to eat nothing.Immediately following the meal,all participants took a memory test.The means and estimated population variances for the three groups on the memory test were: Large: M = 2.1,S² = 1.0; Small: M = 2.5,S² = 1.2; Nothing: M = 2.9,S² = 0.8.Using the .05 significance level,does amount of breakfast eaten affect memory? a.Use the five steps of hypothesis testing. b.Sketch the distributions involved. c.Figure the effect size of this study and indicate whether it is nearer to small,medium,or large. d.Conduct a planned contrast for Large Meal versus Small Meal (using the .05 level). e.Conduct Scheffé's test for the groups in (d)and indicate the F cutoff,the F you would use for the comparison,and the hypothesis-testing decision (reject or do not reject). f.Explain the logic of what you did to a person who is familiar with the t test for independent means,but who knows nothing about the analysis of variance.(Be sure your explanation includes the logic of comparing within-groups to between-groups population variance estimates,the logic of how each of these is figured,the F distribution,and the F table.)

Accepted Answer

The answer of Prior to eating breakfast,25 participants were randomly...

Question 6

Advanced topic: Thinking of each score in an analysis of variance in terms of its overall deviation being divided into two parts is the core idea of __________.

Accepted Answer

The answer of Advanced topic: Thinking of each score in...

Question 7

If a study has 3 groups,each with 20 participants,and a one-way analysis of variance produced an F ratio of 6.21 that was significant at the .01 level,the results would be reported in a research article as __________.

Accepted Answer

The answer of If a study has 3 groups,each with...

Question 8

Rosnow and Rosenthal propose that analyses of variance can often be replaced with __________.

Accepted Answer

The answer of Rosnow and Rosenthal propose that analyses of...

Question 9

based on the following tables.

-Advanced topic: At the .01 significance level,the null hypothesis __________.(Provide hypothesis testing decision.)

Accepted Answer

The answer of based on the following tables.

-Advanced topic: At...

Question 10

According to Cohen's conventions,an R² of 14% (.14)is considered a(n)__________ effect size.

Accepted Answer

The answer of According to Cohen's conventions,an R² of 14%...

Question 11

based on the following tables. -Advanced topic: df_Between = __________.

Accepted Answer

The answer of based on the following tables. -Advanced topic: df_Between...

Question 12

R² is never greater than __________.(Give a number.)

Accepted Answer

The answer of R² is never greater than __________.(Give a...

Question 13

based on the following tables. -Advanced topic: SS_Between = __________.(Give a number.)

Accepted Answer

The answer of based on the following tables. -Advanced topic: SS_Between...

Question 14

In research articles,post-hoc comparisons are often displayed in tables with __________ placed by the means to indicate whether the means are alike or different.

Accepted Answer

The answer of In research articles,post-hoc comparisons are often displayed...

Question 15

High school juniors planning to attend college were randomly assigned to view one of four videos that emphasized social life,athletics,scholarship,or artistic/cultural opportunities at a particular college.After viewing the videos,the participants took a test of their desire to attend this college,with the following results.Using the .05 significance level,did the type of activity emphasized in the video affect the participants' desire to attend the college?  a.Use the five steps of hypothesis testing.
b.Sketch the distributions involved.
c.Figure the effect size of this study and indicate whether it is nearer to small,medium,or large.
d.Conduct a planned contrast for the Social Life versus Scholarship films (using the .05 level).
e.Conduct Scheffé's test for the groups in (d)and indicate the F cutoff,the F you would use for the comparison,and the hypothesis-testing decision (reject or do not reject).
f.Explain the logic of what you did to a person who is familiar with the t test for independent means,but who knows nothing about the analysis of variance.(Be sure your explanation includes the logic of comparing within-groups to between-groups population variance estimates,the logic of how each of these is figured,the F distribution,and the F table.)

Accepted Answer

The answer of High school juniors planning to attend college...

Question 16

based on the following tables. -Advanced topic: R² = __________.

Accepted Answer

The answer of based on the following tables. -Advanced topic: R²...

Question 17

There are four determinants of the power of a one-way analysis of variance: effect size,sample size,significance level,and the __________.

Accepted Answer

The answer of There are four determinants of the power...

Question 18

Forty-five participants (15 per group)were randomly assigned to do a series of math tasks while listening to soft-gentle music,while listening to loud-intense music,or while in silence.The means and estimated population variances for the three groups were: Soft-Gentle: M = 37,S² = 28; Loud-Intense: M = 33,S² = 25; Silence: M = 41,S² = 22.Using the .05 significance level,is there a difference in performance on this kind of math task under these three conditions? a.Use the five steps of hypothesis testing. b.Sketch the distributions involved. c.Figure the effect size of this study and indicate whether it is nearer to small,medium,or large. d.Conduct a planned contrast for the Soft-Gentle versus Silence conditions (using the .05 level). e.Conduct Scheffé's test for the groups in (d)and indicate the F cutoff,the F you would use for the comparison,and the hypothesis-testing decision (reject or do not reject). f.Explain the logic of what you did to a person who is familiar with the t test for independent means,but who knows nothing about the analysis of variance.(Be sure your explanation includes the logic of comparing within-groups to between-groups population variance estimates,the logic of how each of these is figured,the F distribution,and the F table.)

Accepted Answer

The answer of Forty-five participants (15 per group)were randomly assigned...

Question 19

based on the following tables. -Advanced topic: df_Within = __________.

Accepted Answer

The answer of based on the following tables. -Advanced topic: df_Within...

Question 20

A sports psychologist gave a questionnaire about healthy eating habits to randomly selected professional athletes.The results are displayed below.Using the .05 significance level,is there a difference in healthy eating habits among professionals in the three sports?  a.Use the five steps of hypothesis testing.
b.Sketch the distributions involved.
c.Figure the effect size of this study and indicate whether it is nearer to small,medium,or large.
d.Conduct a planned contrast for Baseball versus Football players (using the .05 level).
e.Conduct Scheffé's test for the groups in (d)and indicate the F cutoff,the F you would use for the comparison,and the hypothesis-testing decision (reject or do not reject).
f.Explain the logic of what you did to a person who is familiar with the t test for independent means,but who knows nothing about the analysis of variance.(Be sure your explanation includes the logic of comparing within-groups to between-groups population variance estimates,the logic of how each of these is figured,the F distribution,and the F table.)

Accepted Answer

The answer of A sports psychologist gave a questionnaire about...

Quiz 9: Introduction to the Analysis of Variance

based on the following tables. -Advanced topic: SSTotal = __________.(Give a number.)

based on the following tables. -Advanced topic: SSWithin = __________.(Give a number.)

based on the following tables. -Advanced topic: Complete the ANOVA summary table,replacing the letters (a)to (i)with the appropriate number.

Advanced topic: Thinking of each score in an analysis of variance in terms of its overall deviation being divided into two parts is the core idea of __________.

If a study has 3 groups,each with 20 participants,and a one-way analysis of variance produced an F ratio of 6.21 that was significant at the .01 level,the results would be reported in a research article as __________.

Rosnow and Rosenthal propose that analyses of variance can often be replaced with __________.

based on the following tables. -Advanced topic: At the .01 significance level,the null hypothesis __________.(Provide hypothesis testing decision.)

According to Cohen's conventions,an R2 of 14% (.14)is considered a(n)__________ effect size.

based on the following tables. -Advanced topic: dfBetween = __________.

R2 is never greater than __________.(Give a number.)

based on the following tables. -Advanced topic: SSBetween = __________.(Give a number.)