Question 1

One advantage of a repeated-measures design is that it typically requires fewer participants than an independent-measures design.

Accepted Answer

A) True 
 B)False  True

Question 2

For a repeated-measures study,if other factors are held constant,then an increase in the sample variance will decrease measures of effect size.

Accepted Answer

A) True 
 B)False  True

Question 3

Assuming that other factors are held constant,which of the following would tend to increase the likelihood of rejecting the null hypothesis?

Accepted Answer

A) Decrease the sample size 
B) Increase the sample mean difference 
C) Increase the sample variance 
D) None of the other 3 options would increase the likelihood. 
A) Decrease the sample size 
B) Increase the sample mean difference 
C) Increase the sample variance 
D) None of the other 3 options would increase the likelihood. B

Question 4

A repeated-measures study using a sample of n = 20 participants would produce a t statistic with df = ____.

Accepted Answer

A) 9 
B) 19 
C) 20 
D) 39 
A) 9 
B) 19 
C) 20 
D) 39

Question 5

For the repeated-measures t statistic,the value of the estimated standard error in the denominator is computed entirely from the sample data.

Accepted Answer

A) True 
 B)False

Question 6

A researcher is using a repeated-measures study to evaluate the difference between two treatments.If the difference between the treatments is consistent from one participant to another,then the data should produce ______.

Accepted Answer

A) a small variance for the difference scores and a small standard error 
B) a small variance for the difference scores and a large standard error 
C) a large variance for the difference scores and a small standard error 
D) a large variance for the difference scores and a large standard error 
A) a small variance for the difference scores and a small standard error 
B) a small variance for the difference scores and a large standard error 
C) a large variance for the difference scores and a small standard error 
D) a large variance for the difference scores and a large standard error

Question 7

In general,what characteristics of the difference scores are most likely to produce a significant t statistic for the repeated-measures hypothesis test?

Accepted Answer

A) A large number of scores and a large variance 
B) A large number of scores and a small variance 
C) A small number of scores and a large variance 
D) A small number of scores and a small variance 
A) A large number of scores and a large variance 
B) A large number of scores and a small variance 
C) A small number of scores and a large variance 
D) A small number of scores and a small variance

Question 8

For the repeated-measures t statistic,df = _____.

Accepted Answer

A) n1 + n2 - 2 
B) (n1 - 1) + (n2 - 1) 
C) n - 1 
D) n1 + n2 - 1 
A) n1 + n2 - 2 
B) (n1 - 1) + (n2 - 1) 
C) n - 1 
D) n1 + n2 - 1

Question 9

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

Accepted Answer

A) It will increase in magnitude (move farther toward the tail of the distribution). 
B) It will decrease in magnitude (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 in magnitude (move farther toward the tail of the distribution). 
B) It will decrease in magnitude (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 10

The following data were obtained from a repeated-measures research study.What is the value of SS for the difference scores? $$\begin{array} { l c c } 
\text { Subject } & 1 \text { st } & 2 \text { nd } \
\hline \# 1 & 10 & 11 \
\# 2 & 4 & 6 \
\# 3 & 7 & 9 \
\# 4 & 6 & 5
\end{array}$$

Accepted Answer

A) 10 
B) 6 
C) 4 
D) 1 
A) 10 
B) 6 
C) 4 
D) 1

Question 11

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

Question 12

Repeated-measures designs are particularly well-suited to research studies examining learning or other changes that occur over time.

Accepted Answer

A) True 
 B)False

Question 13

For the following data from a repeated-measures study:
a.Find the difference scores
b.Calculate MD and the variance for the difference scores
c.Calculate the estimated standard error for the mean difference
 $$\begin{array}{l}
\text { Subject Treatment } 1 \text { Treatment } 2\
\begin{array} { r r r } 
\text { A } & 12 & 14 \
\text { B } & 6 & 16 \
\text { C } & 8 & 10 \
\text { D } & 9 & 11
\end{array}
\end{array}$$

Accepted Answer

a.The difference sco

Question 14

For a repeated-measures study comparing two treatment conditions,a researcher obtains Cohen's d = 0.50 for a sample of n = 4 scores with a variance of s² = 16.What is the value of the sample mean?

Accepted Answer

A) MD = 2 
B) MD = 4 
C) MD = 8 
D) MD = 16 
A) MD = 2 
B) MD = 4 
C) MD = 8 
D) MD = 16

Question 15

A sample of n = 9 college students is used to evaluate the effectiveness of a new Study Skills Workshop.Each student's grade point average (GPA)is recorded for the semester before the workshop and for the semester after the workshop.The average GPA improved by MD = 0.60 points with s² = 0.09.The researcher would like to use the sample to estimate how much effect the workshop would have for the entire college population.Which of the following is the 80% confidence interval for these data?

Accepted Answer

A) µD = 0.60 + 0.01(1.397) 
B) µD = 0.60 + 0.09(1.860) 
C) µD = 0.60 + 0.10(1.397) 
D) µD = 0.60 + 0.10(1.860) 
A) µD = 0.60 + 0.01(1.397) 
B) µD = 0.60 + 0.09(1.860) 
C) µD = 0.60 + 0.10(1.397) 
D) µD = 0.60 + 0.10(1.860)

Question 16

A researcher reports df = 18 for a repeated-measures t statistic.This research study used a total of n = 19 participants.

Accepted Answer

A) True 
 B)False

Question 17

A researcher plans to conduct a research study comparing two treatment conditions with a total of 20 participants.Which of the following designs would produce 20 scores in each treatment?

Accepted Answer

A) An independent-measures design 
B) A repeated-measures design 
C) A matched-subjects design 
D) All of the other options would produce 20 scores in each treatment. 
A) An independent-measures design 
B) A repeated-measures design 
C) A matched-subjects design 
D) All of the other options would produce 20 scores in each treatment.

Question 18

Which of the following is the correct null hypothesis for a repeated-measures t test?

Accepted Answer

A) MD = 0 
B) µD = 0 
C) µ1 = µ2 
D) M1 = M2 
A) MD = 0 
B) µD = 0 
C) µ1 = µ2 
D) M1 = M2

Question 19

A researcher obtains t = 2.25 for a repeated-measures study using a sample of n = 10 participants.Based on this t value,what is the correct decision for a two-tailed test?

Accepted Answer

A) Reject the null hypothesis with α = .05 but not with α = .01 
B) Reject the null hypothesis with both α = .05 and α = .01 
C) Fail to reject the null hypothesis with both α = .05 and α = .01 
D) Cannot make a decision without additional information 
A) Reject the null hypothesis with α = .05 but not with α = .01 
B) Reject the null hypothesis with both α = .05 and α = .01 
C) Fail to reject the null hypothesis with both α = .05 and α = .01 
D) Cannot make a decision without additional information

Question 20

For a repeated-measures study,if other factors are held constant,then an increase in sample size will lead to an increase in measures of effect size.

Accepted Answer

A) True 
 B)False

One advantage of a repeated-measures design is that it typically requires fewer participants than an independent-measures design.

For a repeated-measures study,if other factors are held constant,then an increase in the sample variance will decrease measures of effect size.

Assuming that other factors are held constant,which of the following would tend to increase the likelihood of rejecting the null hypothesis?

A repeated-measures study using a sample of n = 20 participants would produce a t statistic with df = ____.

For the repeated-measures t statistic,the value of the estimated standard error in the denominator is computed entirely from the sample data.

A researcher is using a repeated-measures study to evaluate the difference between two treatments.If the difference between the treatments is consistent from one participant to another,then the data should produce ______.

In general,what characteristics of the difference scores are most likely to produce a significant t statistic for the repeated-measures hypothesis test?

For the repeated-measures t statistic,df = _____.

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

The following data were obtained from a repeated-measures research study.What is the value of SS for the difference scores? Subject 1 st 2 nd \#1 10 11 \#2 4 6 \#3 7 9 \#4 6 5

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

Repeated-measures designs are particularly well-suited to research studies examining learning or other changes that occur over time.

For the following data from a repeated-measures study: a.Find the difference scores b.Calculate MD and the variance for the difference scores c.Calculate the estimated standard error for the mean difference Subject Treatment 1 Treatment 2 A 12 14 B 6 16 C 8 10 D 9 11

For a repeated-measures study comparing two treatment conditions,a researcher obtains Cohen's d = 0.50 for a sample of n = 4 scores with a variance of s² = 16.What is the value of the sample mean?

A researcher reports df = 18 for a repeated-measures t statistic.This research study used a total of n = 19 participants.

A researcher plans to conduct a research study comparing two treatment conditions with a total of 20 participants.Which of the following designs would produce 20 scores in each treatment?

Which of the following is the correct null hypothesis for a repeated-measures t test?

A researcher obtains t = 2.25 for a repeated-measures study using a sample of n = 10 participants.Based on this t value,what is the correct decision for a two-tailed test?

For a repeated-measures study,if other factors are held constant,then an increase in sample size will lead to an increase in measures of effect size.

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 and Two-Factor Analysis of Variance

Correlation and Regression.

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

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Exam 11: The t Test for Two Related Samples

One advantage of a repeated-measures design is that it typically requires fewer participants than an independent-measures design.

For a repeated-measures study,if other factors are held constant,then an increase in the sample variance will decrease measures of effect size.

Assuming that other factors are held constant,which of the following would tend to increase the likelihood of rejecting the null hypothesis?

A repeated-measures study using a sample of n = 20 participants would produce a t statistic with df = ____.

For the repeated-measures t statistic,the value of the estimated standard error in the denominator is computed entirely from the sample data.

A researcher is using a repeated-measures study to evaluate the difference between two treatments.If the difference between the treatments is consistent from one participant to another,then the data should produce ______.

In general,what characteristics of the difference scores are most likely to produce a significant t statistic for the repeated-measures hypothesis test?

For the repeated-measures t statistic,df = _____.

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

The following data were obtained from a repeated-measures research study.What is the value of SS for the difference scores? Subject 1 st 2 nd \#1 10 11 \#2 4 6 \#3 7 9 \#4 6 5

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

Repeated-measures designs are particularly well-suited to research studies examining learning or other changes that occur over time.

For the following data from a repeated-measures study: a.Find the difference scores b.Calculate MD and the variance for the difference scores c.Calculate the estimated standard error for the mean difference Subject Treatment 1 Treatment 2 A 12 14 B 6 16 C 8 10 D 9 11

For a repeated-measures study comparing two treatment conditions,a researcher obtains Cohen's d = 0.50 for a sample of n = 4 scores with a variance of s² = 16.What is the value of the sample mean?

A researcher reports df = 18 for a repeated-measures t statistic.This research study used a total of n = 19 participants.

A researcher plans to conduct a research study comparing two treatment conditions with a total of 20 participants.Which of the following designs would produce 20 scores in each treatment?

Which of the following is the correct null hypothesis for a repeated-measures t test?

A researcher obtains t = 2.25 for a repeated-measures study using a sample of n = 10 participants.Based on this t value,what is the correct decision for a two-tailed test?

For a repeated-measures study,if other factors are held constant,then an increase in sample size will lead to an increase in measures of effect size.

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 and Two-Factor Analysis of Variance

Correlation and Regression.

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

Filters