Question 1

Briefly explain the advantages and disadvantages of using a repeated-measures design as opposed to an independent-measures design.

Accepted Answer

A repeated measures design tends to be more precise or more powerful than an independent measures design because it eliminates variability due to individual differences.Also,a repeated-measure design uses fewer subjects than an independent-measures design.However,the results from a repeated-measures experiment can be confounded by time-related factors and order effects.

Question 2

What value is estimated with a confidence interval using the repeated-measures t statistic?​

Accepted Answer

A) ​the mean for a sample of difference scores 
B) ​the mean for a population of difference scores 
C) ​the difference between two population means 
D) ​the difference between two sample means 
A) ​the mean for a sample of difference scores 
B) ​the mean for a population of difference scores 
C) ​the difference between two population means 
D) ​the difference between two sample means B

Question 3

A research report describing the results from a repeated-measures t test states,"t(22)= 1.71,p > .05." From this report you can conclude that the outcome of the hypothesis test was to ____.​

Accepted Answer

A) ​reject the null hypothesis with a sample of n = 23 participants 
B) ​fail to reject the null hypothesis with a sample of n = 23 participants 
C) ​reject the null hypothesis with a sample of n = 22 participants 
D) ​fail to reject the null hypothesis with a sample of n = 22 participants 
A) ​reject the null hypothesis with a sample of n = 23 participants 
B) ​fail to reject the null hypothesis with a sample of n = 23 participants 
C) ​reject the null hypothesis with a sample of n = 22 participants 
D) ​fail to reject the null hypothesis with a sample of n = 22 participants B

Question 4

A repeated-measures study and an independent-measures study both produced a t statistic with df = 16.How many individuals participated in each study?​

Accepted Answer

A) ​18 for repeated-measures and 17 for independent-measures 
B) ​18 for repeated-measures and 18 for independent-measures 
C) ​17 for repeated-measures and 17 for independent-measures 
D) ​17 for repeated-measures and 18 for independent-measures 
A) ​18 for repeated-measures and 17 for independent-measures 
B) ​18 for repeated-measures and 18 for independent-measures 
C) ​17 for repeated-measures and 17 for independent-measures 
D) ​17 for repeated-measures and 18 for independent-measures

Question 5

In general,as the variance of the difference scores increases,the likelihood of finding a significant difference also increases.

Accepted Answer

A) True 
 B)False

Question 6

The following data were obtained from a repeated-measures research study.What is the value of MD for these data? $$\begin{array} { l l l } 
\text { Subject } & 1 \text { st } & 2 \text { nd } \
\# 1 & 10 & 15 \
\# 2 & 4 & 8 \
\# 3 & 7 & 5 \
\# 4 & 6 & 11 \
\hline
\end{array}$$

Accepted Answer

A) ?3 
B) ?3.5 
C) ?4 
D) ?4.5 
A) ?3 
B) ?3.5 
C) ?4 
D) ?4.5

Question 7

The null hypothesis for a repeated-measures test states that ____.​

Accepted Answer

A) ​each individual will have a difference score of D = 0 
B) ​the overall sample will have a mean difference of MD = 0 
C) ​the entire population will have a mean difference of μD = 0 
D) ​the individuals have different means 
A) ​each individual will have a difference score of D = 0 
B) ​the overall sample will have a mean difference of MD = 0 
C) ​the entire population will have a mean difference of μD = 0 
D) ​the individuals have different means

Question 8

In general,if the variance of the difference scores increases,then what will happen to the value of the t statistic?​

Accepted Answer

A) It will increase (move farther toward the tail of the distribution).​ 
B) ​It will decrease (move toward 0 at the center of the distribution). 
C) ​It will stay the same; the t statistic is not affected by the variance of the difference scores. 
D) ​It may increase or may decrease. There is no consistent relationship between variance and the size of the t statistic. 
A) It will increase (move farther toward the tail of the distribution).​ 
B) ​It will decrease (move toward 0 at the center of the distribution). 
C) ​It will stay the same; the t statistic is not affected by the variance of the difference scores. 
D) ​It may increase or may decrease. There is no consistent relationship between variance and the size of the t statistic.

Question 9

A repeated-measures experiment and a matched-subjects experiment each produce a t statistic with df = 10.How many individuals participated in each study?​

Accepted Answer

A) ​11 for repeated, and 11 for matched 
B) ​11 for repeated, and 12 for matched 
C) ​11 for repeated, and 22 for matched 
D) ​12 for repeated, and 12 for matched 
A) ​11 for repeated, and 11 for matched 
B) ​11 for repeated, and 12 for matched 
C) ​11 for repeated, and 22 for matched 
D) ​12 for repeated, and 12 for matched

Question 10

In a repeated-measures experiment,each individual participates in one treatment condition and then moves on to a second treatment condition.One of the major concerns in this type of study is that participation in the first treatment may influence the participant's score in the second treatment.This problem is referred to as ____.​

Accepted Answer

A) ​individual differences 
B) ​order effects 
C) ​homogeneity of variance 
D) ​bi-treatment effect 
A) ​individual differences 
B) ​order effects 
C) ​homogeneity of variance 
D) ​bi-treatment effect

Question 11

A matched-subjects design involves two separate samples,but each individual in one sample is matched one-to-one with an individual in the other sample.

Accepted Answer

A) True 
 B)False

Question 12

In a repeated measures study,the null hypothesis says that the mean for the sample of difference scores should be equal to zero.

Accepted Answer

A) True 
 B)False

Question 13

?For the following data from a repeated-measures study,the sample mean difference is MD = 4. $$\begin{array} { l r r } 
\text { Participant } & X _ { 1 } & X _ { 2 } \
\hline \text { A } & 1 & 7 \
\text { B } & 4 & 8 \
\text { C } & 5 & 3 \
\hline
\end{array}$$

Accepted Answer

A) True 
 B)False

Question 14

For a repeated-measures study,a small variance for the difference scores indicates that the treatment has little or no effect.

Accepted Answer

A) True 
 B)False

Question 15

If a set of n = 9 difference scores has a mean of MD = 3.5 and a variance of s2 = 36,then the sample will produce a repeated-measures t statistic of t = 3.5/2.

Accepted Answer

A) True 
 B)False

Question 16

In a repeated-measures study comparing two treatments with a sample of n = 15 participants,the researcher measures two scores for each individual to obtain a total of 30 scores.The repeated-measures t statistic for this study has df = 29.

Accepted Answer

A) True 
 B)False

Question 17

Compared to an independent-measures design,a repeated-measured study is more likely to find a significant effect because it reduces the contribution of variance due to ____.​

Accepted Answer

A) ​MD 
B) ​degrees of freedom 
C) ​the effect of the treatment 
D) ​individual differences 
A) ​MD 
B) ​degrees of freedom 
C) ​the effect of the treatment 
D) ​individual differences

Question 18

If a set of n = 9 difference scores has a mean of MD = 3.5 and a variance of s2 = 36,then the standard error for the sample mean difference is 4 points.

Accepted Answer

A) True 
 B)False

Question 19

If a repeated-measures study shows a significant difference between two treatments with α = .01,then you can assume that ____.​

Accepted Answer

A) ​the value of Cohen's d is large 
B) ​the percentage of variance explained (r2) is large 
C) ​both Cohen's d and r2 are large 
D) ​a significant effect does not necessarily mean that the effect size will be large 
A) ​the value of Cohen's d is large 
B) ​the percentage of variance explained (r2) is large 
C) ​both Cohen's d and r2 are large 
D) ​a significant effect does not necessarily mean that the effect size will be large

Question 20

A repeated-measures study and an independent-measures study both produce t statistics with df = 20.The independent-measures study used more participants.

Accepted Answer

A) True 
 B)False

Briefly explain the advantages and disadvantages of using a repeated-measures design as opposed to an independent-measures design.

What value is estimated with a confidence interval using the repeated-measures t statistic?

A research report describing the results from a repeated-measures t test states,"t(22)= 1.71,p > .05." From this report you can conclude that the outcome of the hypothesis test was to ____.

A repeated-measures study and an independent-measures study both produced a t statistic with df = 16.How many individuals participated in each study?

In general,as the variance of the difference scores increases,the likelihood of finding a significant difference also increases.

The following data were obtained from a repeated-measures research study.What is the value of M_D for these data? Subject 1 st 2 nd \#1 10 15 \#2 4 8 \#3 7 5 \#4 6 11

The null hypothesis for a repeated-measures test states that ____.

In general,if the variance of the difference scores increases,then what will happen to the value of the t statistic?

A repeated-measures experiment and a matched-subjects experiment each produce a t statistic with df = 10.How many individuals participated in each study?

A matched-subjects design involves two separate samples,but each individual in one sample is matched one-to-one with an individual in the other sample.

In a repeated measures study,the null hypothesis says that the mean for the sample of difference scores should be equal to zero.

?For the following data from a repeated-measures study,the sample mean difference is M_D = 4. Participant A 1 7 B 4 8 C 5 3

For a repeated-measures study,a small variance for the difference scores indicates that the treatment has little or no effect.

If a set of n = 9 difference scores has a mean of M_D = 3.5 and a variance of s² = 36,then the sample will produce a repeated-measures t statistic of t = 3.5/2.

In a repeated-measures study comparing two treatments with a sample of n = 15 participants,the researcher measures two scores for each individual to obtain a total of 30 scores.The repeated-measures t statistic for this study has df = 29.

Compared to an independent-measures design,a repeated-measured study is more likely to find a significant effect because it reduces the contribution of variance due to ____.

If a set of n = 9 difference scores has a mean of M_D = 3.5 and a variance of s² = 36,then the standard error for the sample mean difference is 4 points.

If a repeated-measures study shows a significant difference between two treatments with α = .01,then you can assume that ____.

A repeated-measures study and an independent-measures study both produce t statistics with df = 20.The independent-measures study used more participants.

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

Introduction to Analysis of Variance

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 11: The T Test for Two Related Samples

Briefly explain the advantages and disadvantages of using a repeated-measures design as opposed to an independent-measures design.

What value is estimated with a confidence interval using the repeated-measures t statistic?​

A research report describing the results from a repeated-measures t test states,"t(22)= 1.71,p > .05." From this report you can conclude that the outcome of the hypothesis test was to ____.​

A repeated-measures study and an independent-measures study both produced a t statistic with df = 16.How many individuals participated in each study?​

In general,as the variance of the difference scores increases,the likelihood of finding a significant difference also increases.

The following data were obtained from a repeated-measures research study.What is the value of MD for these data? Subject 1 st 2 nd \#1 10 15 \#2 4 8 \#3 7 5 \#4 6 11

The null hypothesis for a repeated-measures test states that ____.​

In general,if the variance of the difference scores increases,then what will happen to the value of the t statistic?​

A repeated-measures experiment and a matched-subjects experiment each produce a t statistic with df = 10.How many individuals participated in each study?​

A matched-subjects design involves two separate samples,but each individual in one sample is matched one-to-one with an individual in the other sample.

In a repeated measures study,the null hypothesis says that the mean for the sample of difference scores should be equal to zero.

?For the following data from a repeated-measures study,the sample mean difference is MD = 4. Participant A 1 7 B 4 8 C 5 3

For a repeated-measures study,a small variance for the difference scores indicates that the treatment has little or no effect.

If a set of n = 9 difference scores has a mean of MD = 3.5 and a variance of s2 = 36,then the sample will produce a repeated-measures t statistic of t = 3.5/2.

In a repeated-measures study comparing two treatments with a sample of n = 15 participants,the researcher measures two scores for each individual to obtain a total of 30 scores.The repeated-measures t statistic for this study has df = 29.

Compared to an independent-measures design,a repeated-measured study is more likely to find a significant effect because it reduces the contribution of variance due to ____.​

If a set of n = 9 difference scores has a mean of MD = 3.5 and a variance of s2 = 36,then the standard error for the sample mean difference is 4 points.

If a repeated-measures study shows a significant difference between two treatments with α = .01,then you can assume that ____.​

A repeated-measures study and an independent-measures study both produce t statistics with df = 20.The independent-measures study used more participants.

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

Introduction to Analysis of Variance

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

What value is estimated with a confidence interval using the repeated-measures t statistic?

A research report describing the results from a repeated-measures t test states,"t(22)= 1.71,p > .05." From this report you can conclude that the outcome of the hypothesis test was to ____.

A repeated-measures study and an independent-measures study both produced a t statistic with df = 16.How many individuals participated in each study?

The following data were obtained from a repeated-measures research study.What is the value of M_D for these data? Subject 1 st 2 nd \#1 10 15 \#2 4 8 \#3 7 5 \#4 6 11

The null hypothesis for a repeated-measures test states that ____.

In general,if the variance of the difference scores increases,then what will happen to the value of the t statistic?

A repeated-measures experiment and a matched-subjects experiment each produce a t statistic with df = 10.How many individuals participated in each study?

?For the following data from a repeated-measures study,the sample mean difference is M_D = 4. Participant A 1 7 B 4 8 C 5 3

If a set of n = 9 difference scores has a mean of M_D = 3.5 and a variance of s² = 36,then the sample will produce a repeated-measures t statistic of t = 3.5/2.

Compared to an independent-measures design,a repeated-measured study is more likely to find a significant effect because it reduces the contribution of variance due to ____.

If a set of n = 9 difference scores has a mean of M_D = 3.5 and a variance of s² = 36,then the standard error for the sample mean difference is 4 points.

If a repeated-measures study shows a significant difference between two treatments with α = .01,then you can assume that ____.