Question 1

Post tests are only needed if H0 is rejected in an ANOVA comparing more than 2 treatments.

Accepted Answer

A) True 
 B)False

Question 2

An analysis of variance comparing three treatment conditions produces dftotal = 32.If the samples are all the same size,how many individuals are in each sample?​

Accepted Answer

A) ​8 
B) ​9 
C) ​10 
D) ​11 
A) ​8 
B) ​9 
C) ​10 
D) ​11

Question 3

The within-treatments variance provides a measure of the variability inside each treatment condition.

Accepted Answer

A) True 
 B)False

Question 4

The between-treatments variance measures the overall differences between treatment conditions.

Accepted Answer

A) True 
 B)False

Question 5

An analysis of variance is used to evaluate the mean differences for a research study comparing four treatments with a separate sample of n = 8 in each treatment.If the data produce an F-ratio of F = 5.50,then which statistical decision is correct?​

Accepted Answer

A) ​Reject the null hypothesis with α = .05 but not with α = .01. 
B) ​Reject the null hypothesis with either α = .05 or α = .01. 
C) ​Fail to reject the null hypothesis with either α = .05 or α = .01. 
D) ​There is not enough information to make a statistical decision. 
A) ​Reject the null hypothesis with α = .05 but not with α = .01. 
B) ​Reject the null hypothesis with either α = .05 or α = .01. 
C) ​Fail to reject the null hypothesis with either α = .05 or α = .01. 
D) ​There is not enough information to make a statistical decision.

Question 6

For ANOVA,when the null hypothesis is true,the F-ratio is balanced so that the numerator and the denominator are both measuring the same sources of variance.

Accepted Answer

A) True 
 B)False

Question 7

If an analysis of variance is used for the following data,what would be the effect of changing the value of SS2 to 100?? $$\begin{array} { l l } 
\text { Sample Data}\
\mathrm { M } _ { 1 } = 15 & \mathrm { M } _ { 2 } = 25 \
\mathrm { SS } _ { 1 } = 90 & \mathrm { SS } _ { 2 } = 70 \
\hline
\end{array}$$

Accepted Answer

A) ?Increase SSwithin and increase the size of the F-ratio. 
B) ?Increase SSwithin and decrease the size of the F-ratio. 
C) ?Decrease SSwithin and increase the size of the F-ratio. 
D) ?Decrease SSwithin and decrease the size of the F-ratio. 
A) ?Increase SSwithin and increase the size of the F-ratio. 
B) ?Increase SSwithin and decrease the size of the F-ratio. 
C) ?Decrease SSwithin and increase the size of the F-ratio. 
D) ?Decrease SSwithin and decrease the size of the F-ratio.

Question 8

For an independent-measures experiment comparing two treatment conditions with a sample of n = 10 in each treatment,what are the correct df values for the F-ratio?​

Accepted Answer

A) ​1, 18 
B) ​1, 19 
C) ​2, 18 
D) ​2, 19 
A) ​1, 18 
B) ​1, 19 
C) ​2, 18 
D) ​2, 19

Question 9

For an ANOVA comparing three treatment conditions,rejecting the null hypothesis is equivalent to concluding that all three treatment means are different.

Accepted Answer

A) True 
 B)False

Question 10

An analysis of variance produces SSbetween = 40 and MSbetween = 20.In this analysis,how many treatment conditions are being compared?​

Accepted Answer

A) ​2 
B) ​3 
C) ​4 
D) ​20 
A) ​2 
B) ​3 
C) ​4 
D) ​20

Question 11

A researcher uses an analysis of variance to test for mean differences among three treatments with a sample of n = 12 in each treatment.The F-ratio for this analysis would have which df values?​

Accepted Answer

A) ​df = 2, 11 
B) ​df = 2, 33 
C) ​df = 2, 35 
D) ​df = 2, 36 
A) ​df = 2, 11 
B) ​df = 2, 33 
C) ​df = 2, 35 
D) ​df = 2, 36

Question 12

If an analysis of variance produces SSbetween = 20 and SSwithin = 40,then η2 = 0.50.

Accepted Answer

A) True 
 B)False

Question 13

An independent-measures research study compares three treatment conditions using a sample of n = 5 in each treatment.For this study,the three samples have SS1 = 10,SS2 = 20,and SS3 = 15.What value would be obtained for MSwithin?​

Accepted Answer

A) 45/14​ 
B) ​45/12 
C) ​10/2 
D) ​10/3 
A) 45/14​ 
B) ​45/12 
C) ​10/2 
D) ​10/3

Question 14

The distribution of F-ratios is negatively skewed.

Accepted Answer

A) True 
 B)False

Question 15

Effect size for analysis of variance is measured by η2 which equals SSbetween divided by SSwithin.

Accepted Answer

A) True 
 B)False

Question 16

As one does more and more separate hypothesis tests,the risk of a Type I error accumulates and is called the experiment-wise alpha level.

Accepted Answer

A) True 
 B)False

Question 17

If an analysis of variance produces a value of F = 0,then all of the samples have exactly the same mean.

Accepted Answer

A) True 
 B)False

Question 18

In an analysis of variance,which value is determined by the size of the sample variances?​

Accepted Answer

A) SSbetween​ 
B) ​SSwithin 
C) ​dfbetween 
D) ​dfwithin 
A) SSbetween​ 
B) ​SSwithin 
C) ​dfbetween 
D) ​dfwithin

Question 19

For an ANOVA with SSbetween = 40 and SSwithin = 60,η2 = 40/100.

Accepted Answer

A) True 
 B)False

Question 20

What provides a measure of the variance caused by random,unsystematic differences?​

Accepted Answer

A) ​the error term 
B) ​the F ratio 
C) ​MS 
D) ​SStotal 
A) ​the error term 
B) ​the F ratio 
C) ​MS 
D) ​SStotal

Post tests are only needed if H₀ is rejected in an ANOVA comparing more than 2 treatments.

An analysis of variance comparing three treatment conditions produces df_total = 32.If the samples are all the same size,how many individuals are in each sample?

The within-treatments variance provides a measure of the variability inside each treatment condition.

The between-treatments variance measures the overall differences between treatment conditions.

An analysis of variance is used to evaluate the mean differences for a research study comparing four treatments with a separate sample of n = 8 in each treatment.If the data produce an F-ratio of F = 5.50,then which statistical decision is correct?

For ANOVA,when the null hypothesis is true,the F-ratio is balanced so that the numerator and the denominator are both measuring the same sources of variance.

If an analysis of variance is used for the following data,what would be the effect of changing the value of SS₂ to 100?? Sample Data =15 =25 =90 =70

For an independent-measures experiment comparing two treatment conditions with a sample of n = 10 in each treatment,what are the correct df values for the F-ratio?

For an ANOVA comparing three treatment conditions,rejecting the null hypothesis is equivalent to concluding that all three treatment means are different.

An analysis of variance produces SS_between = 40 and MS_between = 20.In this analysis,how many treatment conditions are being compared?

A researcher uses an analysis of variance to test for mean differences among three treatments with a sample of n = 12 in each treatment.The F-ratio for this analysis would have which df values?

If an analysis of variance produces SS_between = 20 and SS_within = 40,then η² = 0.50.

An independent-measures research study compares three treatment conditions using a sample of n = 5 in each treatment.For this study,the three samples have SS₁ = 10,SS₂ = 20,and SS₃ = 15.What value would be obtained for MS_within?

The distribution of F-ratios is negatively skewed.

Effect size for analysis of variance is measured by η² which equals SS_between divided by SS_within.

As one does more and more separate hypothesis tests,the risk of a Type I error accumulates and is called the experiment-wise alpha level.

If an analysis of variance produces a value of F = 0,then all of the samples have exactly the same mean.

In an analysis of variance,which value is determined by the size of the sample variances?

For an ANOVA with SS_between = 40 and SS_within = 60,η² = 40/100.

What provides a measure of the variance caused by random,unsystematic differences?

Introduction to Statistics

Frequency Distributions

Central Tendency

Variability

Z-Scores: Location of Scores and Standardized Distributions

Probability

Probability and Samples: the Distribution of Sample Means

Introduction to Hypothesis Testing

Introduction to the T Statistic

The T Test for Two Independent Samples

The T Test for Two Related Samples

Repeated-Measures Analysis of Variance Anova

Two-Factor Analysis of Variance Independent Measures

Correlation

Introduction to Regression

The Chi-Square Statistic: Tests for Goodness of Fit and Independence

The Binomial Test

Filters

Exam 12: Introduction to Analysis of Variance

Post tests are only needed if H0 is rejected in an ANOVA comparing more than 2 treatments.

An analysis of variance comparing three treatment conditions produces dftotal = 32.If the samples are all the same size,how many individuals are in each sample?​

The within-treatments variance provides a measure of the variability inside each treatment condition.

The between-treatments variance measures the overall differences between treatment conditions.

An analysis of variance is used to evaluate the mean differences for a research study comparing four treatments with a separate sample of n = 8 in each treatment.If the data produce an F-ratio of F = 5.50,then which statistical decision is correct?​

For ANOVA,when the null hypothesis is true,the F-ratio is balanced so that the numerator and the denominator are both measuring the same sources of variance.

If an analysis of variance is used for the following data,what would be the effect of changing the value of SS2 to 100?? Sample Data =15 =25 =90 =70

For an independent-measures experiment comparing two treatment conditions with a sample of n = 10 in each treatment,what are the correct df values for the F-ratio?​

For an ANOVA comparing three treatment conditions,rejecting the null hypothesis is equivalent to concluding that all three treatment means are different.

An analysis of variance produces SSbetween = 40 and MSbetween = 20.In this analysis,how many treatment conditions are being compared?​

A researcher uses an analysis of variance to test for mean differences among three treatments with a sample of n = 12 in each treatment.The F-ratio for this analysis would have which df values?​

If an analysis of variance produces SSbetween = 20 and SSwithin = 40,then η2 = 0.50.

An independent-measures research study compares three treatment conditions using a sample of n = 5 in each treatment.For this study,the three samples have SS1 = 10,SS2 = 20,and SS3 = 15.What value would be obtained for MSwithin?​

The distribution of F-ratios is negatively skewed.

Effect size for analysis of variance is measured by η2 which equals SSbetween divided by SSwithin.

As one does more and more separate hypothesis tests,the risk of a Type I error accumulates and is called the experiment-wise alpha level.

If an analysis of variance produces a value of F = 0,then all of the samples have exactly the same mean.

In an analysis of variance,which value is determined by the size of the sample variances?​

For an ANOVA with SSbetween = 40 and SSwithin = 60,η2 = 40/100.

What provides a measure of the variance caused by random,unsystematic differences?​

Introduction to Statistics

Frequency Distributions

Central Tendency

Variability

Z-Scores: Location of Scores and Standardized Distributions

Probability

Probability and Samples: the Distribution of Sample Means

Introduction to Hypothesis Testing

Introduction to the T Statistic

The T Test for Two Independent Samples

The T Test for Two Related Samples

Repeated-Measures Analysis of Variance Anova

Two-Factor Analysis of Variance Independent Measures

Correlation

Introduction to Regression

The Chi-Square Statistic: Tests for Goodness of Fit and Independence

The Binomial Test

Filters

Post tests are only needed if H₀ is rejected in an ANOVA comparing more than 2 treatments.

An analysis of variance comparing three treatment conditions produces df_total = 32.If the samples are all the same size,how many individuals are in each sample?

An analysis of variance is used to evaluate the mean differences for a research study comparing four treatments with a separate sample of n = 8 in each treatment.If the data produce an F-ratio of F = 5.50,then which statistical decision is correct?

If an analysis of variance is used for the following data,what would be the effect of changing the value of SS₂ to 100?? Sample Data =15 =25 =90 =70

For an independent-measures experiment comparing two treatment conditions with a sample of n = 10 in each treatment,what are the correct df values for the F-ratio?

An analysis of variance produces SS_between = 40 and MS_between = 20.In this analysis,how many treatment conditions are being compared?

A researcher uses an analysis of variance to test for mean differences among three treatments with a sample of n = 12 in each treatment.The F-ratio for this analysis would have which df values?

If an analysis of variance produces SS_between = 20 and SS_within = 40,then η² = 0.50.

An independent-measures research study compares three treatment conditions using a sample of n = 5 in each treatment.For this study,the three samples have SS₁ = 10,SS₂ = 20,and SS₃ = 15.What value would be obtained for MS_within?

Effect size for analysis of variance is measured by η² which equals SS_between divided by SS_within.

In an analysis of variance,which value is determined by the size of the sample variances?

For an ANOVA with SS_between = 40 and SS_within = 60,η² = 40/100.

What provides a measure of the variance caused by random,unsystematic differences?