Question 1

In general, what is the effect of an increase in the variance for the sample of difference scores?

Accepted Answer

A)  an increase in the standard error and an increase in the value of t
B)  an increase in the standard error and a decrease in the value of t
C)  a decrease in the standard error and an increase in the value of t
D)  a decrease in the standard error and a decrease in the value of t

Question 2

For which of the following situations would a repeated-measures design have the maximum advantage over an independent-measures design?

Accepted Answer

A)  when many subjects are available and individual differences are small
B)  when very few subjects are available and individual differences are small
C)  when many subjects are available and individual differences are large
D)  when very few subjects are available and individual differences are large

Question 3

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

Question 4

For a repeated-measures study comparing two treatments with a sample of n = 9 participants, the difference scores have a mean of MD = 4.90 with SS = 288.What is the estimated standard error for the sample mean difference?

Accepted Answer

A)  36
B)  36/8 = 4.5
C)  4
D)  2

Question 5

Although a repeated-measures study measures two scores for each participant, the sample mean and variance are computed using only one score for each participant.

Accepted Answer

A) True 
 B)False

Question 6

A researcher uses a repeated-measures study to compare two treatment conditions with a set of 20 scores in each treatment.What would be the value of df for the repeated-measures t statistic?

Accepted Answer

A)  df = 18
B)  df = 19
C)  df = 38
D)  df = 39

Question 7

A repeated-measures study with a sample of n = 16 participants produces a repeated-measures t = 2.00.If effect size is measured using r2, then r2 = 4/20.

Accepted Answer

A) True 
 B)False

Question 8

For a repeated-measures study comparing two treatment conditions, a researcher obtains a sample of n = 9 difference scores with a mean of MD = 4 and a variance of s2 = 36.What is the value for the repeated-measures t statistic for these data?

Accepted Answer

A)  4/2
B)  4/4
C)  4/6
D)  4/36

Question 9

A researcher uses a repeated-measures design to compare individuals' performance before treatment with their performance after treatment.If all of the participants show improved performance of 8 or 9 points after treatment, then the researcher should find ______.

Accepted Answer

A)  a sample mean difference near zero
B)  a t statistic near zero
C)  the variance of the difference scores is near zero
D)  None of the other options is correct.

Exam 11: The T Test for Two Related Samples

A researcher uses a repeated-measures study to compare two treatment conditions with a set of 20 scores in each treatment.What would be the value of df for the repeated-measures t statistic?

Correct Answer
verified

For which of the following situations would a repeated-measures design have the maximum advantage over an independent-measures design?

Correct Answer
verified

A researcher uses a repeated-measures design to compare individuals' performance before treatment with their performance after treatment.If all of the participants show improved performance of 8 or 9 points after treatment, then the researcher should find ______.

Correct Answer
verified

For a repeated-measures study comparing two treatment conditions, a researcher obtains a sample of n = 9 difference scores with a mean of M_D = 4 and a variance of s² = 36.What is the value for the repeated-measures t statistic for these data?

Correct Answer
verified

For a repeated-measures study comparing two treatments with a sample of n = 9 participants, the difference scores have a mean of M_D = 4.90 with SS = 288.What is the estimated standard error for the sample mean difference?

Correct Answer
verified

In general, what is the effect of an increase in the variance for the sample of difference scores?

Correct Answer
verified

Although a repeated-measures study measures two scores for each participant, the sample mean and variance are computed using only one score for each participant.

Correct Answer
verified

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

Correct Answer
verified

A repeated-measures study with a sample of n = 16 participants produces a repeated-measures t = 2.00.If effect size is measured using r², then r² = 4/20.

Correct Answer
verified

Exam 11: The T Test for Two Related Samples

A researcher uses a repeated-measures study to compare two treatment conditions with a set of 20 scores in each treatment.What would be the value of df for the repeated-measures t statistic?

Correct AnswerverifiedShow Answer

For which of the following situations would a repeated-measures design have the maximum advantage over an independent-measures design?

Correct AnswerverifiedShow Answer

A researcher uses a repeated-measures design to compare individuals' performance before treatment with their performance after treatment.If all of the participants show improved performance of 8 or 9 points after treatment, then the researcher should find ______.

Correct AnswerverifiedShow Answer

For a repeated-measures study comparing two treatment conditions, a researcher obtains a sample of n = 9 difference scores with a mean of MD = 4 and a variance of s2 = 36.What is the value for the repeated-measures t statistic for these data?

Correct AnswerverifiedShow Answer

For a repeated-measures study comparing two treatments with a sample of n = 9 participants, the difference scores have a mean of MD = 4.90 with SS = 288.What is the estimated standard error for the sample mean difference?

Correct AnswerverifiedShow Answer

In general, what is the effect of an increase in the variance for the sample of difference scores?

Correct AnswerverifiedShow Answer

Although a repeated-measures study measures two scores for each participant, the sample mean and variance are computed using only one score for each participant.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

A repeated-measures study with a sample of n = 16 participants produces a repeated-measures t = 2.00.If effect size is measured using r2, then r2 = 4/20.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

For a repeated-measures study comparing two treatment conditions, a researcher obtains a sample of n = 9 difference scores with a mean of M_D = 4 and a variance of s² = 36.What is the value for the repeated-measures t statistic for these data?

Correct Answer
verified

For a repeated-measures study comparing two treatments with a sample of n = 9 participants, the difference scores have a mean of M_D = 4.90 with SS = 288.What is the estimated standard error for the sample mean difference?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

A repeated-measures study with a sample of n = 16 participants produces a repeated-measures t = 2.00.If effect size is measured using r², then r² = 4/20.

Correct Answer
verified