Question 1

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 2

A research study produces a t statistic with df = 14.For this study,which of the following designs would require a total of 30 participants?

Accepted Answer

A)  An independent-measures design
B)  A repeated-measures design
C)  A matched-subjects design
D)  None of the other options would require a total of 30 participants.

Question 3

A research report describing the results from a repeated-measures study states that the data show no significant difference between the two treatments,t(10) = 1.65,p > .05.Based on this report,how many individuals participated in the research study?

Accepted Answer

A)  9
B)  10
C)  11
D)  12

Question 4

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

Question 5

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 6

For a repeated-measures study,as the sample mean difference increases,the likelihood of rejecting the null hypothesis also increases.

Accepted Answer

A) True 
 B)False

Question 7

If other factors are held constant,which of the following sets of data is most likely to produce a significant value for the repeated-measures t statistic?

Accepted Answer

A)  n = 15 and MD = 2
B)  n = 15 and MD = 4
C)  n = 30 and MD = 2
D)  n = 30 and MD = 4

Question 8

Which of the following possibilities is a serious concern with a repeated-measures study?

Accepted Answer

A)  You will obtain negative values for the difference scores.
B)  The results will be influenced by order effects.
C)  The mean difference is due to individual differences rather than treatment differences.
D)  All of the other options are major concerns.

Question 9

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 either α = .05 or α = .01
C)  Fail to reject the null hypothesis with either α = .05 or α = .01
D)  Cannot make a decision without additional information

Question 10

The null hypothesis for a repeated-measures test states,

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)  All of the other options are correct.

Question 11

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

Question 12

A sample of difference scores has a mean of MD = 5 with a variance of s2 = 100.If effect size is measured using Cohen's d,what is the value of d?

Accepted Answer

A)  d = 5/10
B)  d = 5/100
C)  d = 25/100
D)  Cannot determine without knowing the sample size

Question 13

A repeated-measures study and an independent-measures study both produced a t statistic with df = 10.How many individuals participated in each study?

Accepted Answer

A)  12 for repeated-measures and 11 for independent-measures
B)  12 for repeated-measures and 12 for independent-measures
C)  11 for repeated-measures and 11 for independent-measures
D)  11 for repeated-measures and 12 for independent-measures

Question 14

For a repeated-measures study,if the null hypothesis is true,then what value should be obtained for the sample mean.

Accepted Answer

A)  MD = 0
B)  MD > 0
C)  MD 
D)  MD near 0

Question 15

One concern for a repeated-measures study is that the participants in one treatment may have different characteristics than the participants in the other treatment.

Accepted Answer

A) True 
 B)False

Question 16

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)  time-related factors
B)  order effects
C)  the effect of the treatment
D)  individual differences

Exam 11: The T Test for Two Related Samples

A research report describing the results from a repeated-measures study states that the data show no significant difference between the two treatments,t(10) = 1.65,p > .05.Based on this report,how many individuals participated in the research study?

Correct Answer
verified

A sample of difference scores has a mean of M_D = 5 with a variance of s² = 100.If effect size is measured using Cohen's d,what is the value of d?

Correct Answer
verified

For a repeated-measures study,if the null hypothesis is true,then what value should be obtained for the sample mean.

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

If other factors are held constant,which of the following sets of data is most likely to produce a significant value for the repeated-measures t statistic?

Correct Answer
verified

A repeated-measures study and an independent-measures study both produced a t statistic with df = 10.How many individuals participated in each study?

Correct Answer
verified

The null hypothesis for a repeated-measures test states,

Correct Answer
verified

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?

Correct Answer
verified

A research study produces a t statistic with df = 14.For this study,which of the following designs would require a total of 30 participants?

Correct Answer
verified

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.

Correct Answer
verified

One concern for a repeated-measures study is that the participants in one treatment may have different characteristics than the participants in the other treatment.

Correct Answer
verified

Which of the following possibilities is a serious concern with a repeated-measures study?

Correct Answer
verified

For a repeated-measures study,as the sample mean difference increases,the likelihood of rejecting the null hypothesis also increases.

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

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 ______.

Correct Answer
verified

Exam 11: The T Test for Two Related Samples

A research report describing the results from a repeated-measures study states that the data show no significant difference between the two treatments,t(10) = 1.65,p > .05.Based on this report,how many individuals participated in the research study?

Correct AnswerverifiedShow Answer

A sample of difference scores has a mean of MD = 5 with a variance of s2 = 100.If effect size is measured using Cohen's d,what is the value of d?

Correct AnswerverifiedShow Answer

For a repeated-measures study,if the null hypothesis is true,then what value should be obtained for the sample mean.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

If other factors are held constant,which of the following sets of data is most likely to produce a significant value for the repeated-measures t statistic?

Correct AnswerverifiedShow Answer

A repeated-measures study and an independent-measures study both produced a t statistic with df = 10.How many individuals participated in each study?

Correct AnswerverifiedShow Answer

The null hypothesis for a repeated-measures test states,

Correct AnswerverifiedShow Answer

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?

Correct AnswerverifiedShow Answer

A research study produces a t statistic with df = 14.For this study,which of the following designs would require a total of 30 participants?

Correct AnswerverifiedShow Answer

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.

Correct AnswerverifiedShow Answer

One concern for a repeated-measures study is that the participants in one treatment may have different characteristics than the participants in the other treatment.

Correct AnswerverifiedShow Answer

Which of the following possibilities is a serious concern with a repeated-measures study?

Correct AnswerverifiedShow Answer

For a repeated-measures study,as the sample mean difference increases,the likelihood of rejecting the null hypothesis also increases.

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

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 ______.

Correct AnswerverifiedShow Answer

Correct Answer
verified

A sample of difference scores has a mean of M_D = 5 with a variance of s² = 100.If effect size is measured using Cohen's d,what is the value of d?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

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.

Correct Answer
verified

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

Correct Answer
verified