Exam 11: The T Test for Two Related Samples

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?

(Multiple Choice)

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Question 21

A researcher obtains t(20)= 2.00 and M_D = 9 for a repeated-measures study.If the researcher measures effect size using the percentage of variance accounted for,what value will be obtained for r²?

(Multiple Choice)

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Question 22

Calculate the difference scores and find M_D for the following data from a repeated-measures study.Subject Treatment 1 Treatment 2 12 14 7 15 10 8 8 12

(Essay)

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Question 23

If all of the participants in a repeated-measures study show roughly the same 10-point difference between treatments,then the data are likely to produce a significant value for the t statistic.

(True/False)

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Question 24

Repeated-measures designs are particularly well-suited to research questions concerning the difference between two distinct populations (for example,males versus females).

(True/False)

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Question 25

Which possible outcome is of serious concern with a repeated-measures study?

(Multiple Choice)

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Question 26

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

(Multiple Choice)

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Question 27

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 a ____.

(Multiple Choice)

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Question 28

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

(Multiple Choice)

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Question 29

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?

(Multiple Choice)

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Question 30

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

(Multiple Choice)

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Question 31

A researcher reports t(12)= 2.86,p < .05 for a repeated-measures research study.How many individuals participated in the study?

(Multiple Choice)

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Question 32

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 ____.

(Multiple Choice)

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Question 33

A researcher conducts a repeated-measures study to evaluate a treatment with a sample of n = 16 participants and obtains a t statistic of t = 1.94.The treatment is expected to increase scores and the sample mean shows an increase.What is the correct decision for a hypothesis test using α = .05?

(Multiple Choice)

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Question 34

A Wilcoxon test can be used if there is reason to suspect that one of the assumptions for the repeated-measures t test has been violated.

(True/False)

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Question 35

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

(Multiple Choice)

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Question 36

A set of n = 16 difference scores has a mean of M_D = 4 and a variance of s² = 36.Cohen's d for this sample is d = 4/6.

(True/False)

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Question 37

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

(True/False)

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Question 38

A research report describing the results from a repeated-measures study states: The data show no significant difference between the two treatments,t(10)= 1.65,p > .05.Based on this report,you can conclude that a total of ____ individuals participated in the research study.

(Multiple Choice)

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Question 39

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

(True/False)

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Question 40

Showing 21 - 40 of 76

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 obtains t(20)= 2.00 and M_D = 9 for a repeated-measures study.If the researcher measures effect size using the percentage of variance accounted for,what value will be obtained for r²?

Calculate the difference scores and find M_D for the following data from a repeated-measures study.Subject Treatment 1 Treatment 2 12 14 7 15 10 8 8 12

If all of the participants in a repeated-measures study show roughly the same 10-point difference between treatments,then the data are likely to produce a significant value for the t statistic.

Repeated-measures designs are particularly well-suited to research questions concerning the difference between two distinct populations (for example,males versus females).

Which possible outcome is of serious concern with a repeated-measures study?

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

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 a ____.

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

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?

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

A researcher reports t(12)= 2.86,p < .05 for a repeated-measures research study.How many individuals participated in the study?

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 ____.

A researcher conducts a repeated-measures study to evaluate a treatment with a sample of n = 16 participants and obtains a t statistic of t = 1.94.The treatment is expected to increase scores and the sample mean shows an increase.What is the correct decision for a hypothesis test using α = .05?

A Wilcoxon test can be used if there is reason to suspect that one of the assumptions for the repeated-measures t test has been violated.

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

A set of n = 16 difference scores has a mean of M_D = 4 and a variance of s² = 36.Cohen's d for this sample is d = 4/6.

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

A research report describing the results from a repeated-measures study states: The data show no significant difference between the two treatments,t(10)= 1.65,p > .05.Based on this report,you can conclude that a total of ____ individuals participated in the research study.

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

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

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 obtains t(20)= 2.00 and MD = 9 for a repeated-measures study.If the researcher measures effect size using the percentage of variance accounted for,what value will be obtained for r2?​

Calculate the difference scores and find MD for the following data from a repeated-measures study.Subject Treatment 1 Treatment 2 12 14 7 15 10 8 8 12

If all of the participants in a repeated-measures study show roughly the same 10-point difference between treatments,then the data are likely to produce a significant value for the t statistic.

Repeated-measures designs are particularly well-suited to research questions concerning the difference between two distinct populations (for example,males versus females).​

Which possible outcome is of serious concern with a repeated-measures study?​

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

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 a ____.​

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

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?​

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

A researcher reports t(12)= 2.86,p < .05 for a repeated-measures research study.How many individuals participated in the study?​

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 ____.​

A researcher conducts a repeated-measures study to evaluate a treatment with a sample of n = 16 participants and obtains a t statistic of t = 1.94.The treatment is expected to increase scores and the sample mean shows an increase.What is the correct decision for a hypothesis test using α = .05?​

A Wilcoxon test can be used if there is reason to suspect that one of the assumptions for the repeated-measures t test has been violated.

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

A set of n = 16 difference scores has a mean of MD = 4 and a variance of s2 = 36.Cohen's d for this sample is d = 4/6.

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

A research report describing the results from a repeated-measures study states: The data show no significant difference between the two treatments,t(10)= 1.65,p > .05.Based on this report,you can conclude that a total of ____ individuals participated in the research study.​

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

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

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 obtains t(20)= 2.00 and M_D = 9 for a repeated-measures study.If the researcher measures effect size using the percentage of variance accounted for,what value will be obtained for r²?

Calculate the difference scores and find M_D for the following data from a repeated-measures study.Subject Treatment 1 Treatment 2 12 14 7 15 10 8 8 12

Repeated-measures designs are particularly well-suited to research questions concerning the difference between two distinct populations (for example,males versus females).

Which possible outcome is of serious concern with a repeated-measures study?

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

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 a ____.

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

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?

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

A researcher reports t(12)= 2.86,p < .05 for a repeated-measures research study.How many individuals participated in the study?

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 ____.

A researcher conducts a repeated-measures study to evaluate a treatment with a sample of n = 16 participants and obtains a t statistic of t = 1.94.The treatment is expected to increase scores and the sample mean shows an increase.What is the correct decision for a hypothesis test using α = .05?

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

A set of n = 16 difference scores has a mean of M_D = 4 and a variance of s² = 36.Cohen's d for this sample is d = 4/6.

A research report describing the results from a repeated-measures study states: The data show no significant difference between the two treatments,t(10)= 1.65,p > .05.Based on this report,you can conclude that a total of ____ individuals participated in the research study.