Exam 10: Testing Means: Truehe Related-Samples T Test

A researcher records the strength of a conditioned response among 12 rats in the presence and absence of conditioned cues.If he computes a related-samples t test at a .05 level of significance (two-tailed test),then what are the critical values for this test?

(Multiple Choice)

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Question 21

Which of the following is an advantage for selecting related samples compared to selecting independent samples in behavioral research?

(Multiple Choice)

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Question 22

All other things being equal,as the degrees of freedom increase,what happens to the critical value for a related-samples t test (or for any t test,for that matter)?

(Multiple Choice)

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Question 23

A researcher matched 30 participants on intelligence (hence 15 pairs of participants)and then compared differences in emotional responsiveness to two experimental stimuli between each pair.For this test,what are the critical values,assuming a two-tailed test at a .05 level of significance?

(Multiple Choice)

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Question 24

A researcher compares the difference in the amount of texting by students in class during the first week and last week of classes.The type of design described here is called a

(Multiple Choice)

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Question 25

Using the same data,a related-samples t test has greater power than a two-independent-sample t test to detect an effect.

(True/False)

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Question 26

Selecting related samples increases standard error and reduces power.

(True/False)

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Question 27

The test statistic for a related-samples t test makes tests concerning a single sample of

(Multiple Choice)

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Question 28

All other things being equal,reducing the level of significance from .05 to .01 will ______ the value of the test statistic for a related-samples t test.

(Multiple Choice)

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Question 29

The degrees of freedom for the related-samples t test are the number of difference scores minus one.

(True/False)

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Question 30

Both estimates of proportion of variance, $\eta$ ² and $\omega$ ²,are computed the same for two-independent and related-samples t tests.

(True/False)

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Question 31

A researcher conducts a study in which the same participants are observed across each level of the independent variable.If there are only two levels of the independent variable,then what type of t test is appropriate for this study?

(Multiple Choice)

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Question 32

A researcher computes the mean difference in locomotion in a sample of 12 rats before and 30 min after an injection of amphetamine.Rats were placed in a box with infrared beams.The number of times rats crossed the beams was used as a measure of locomotion.The mean difference in locomotion was 6.2 ± 8.4 (M_D± S_D)and this difference was significant.What is the effect size for this result using estimated Cohen's d?

(Multiple Choice)

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Question 33

Using APA format,which value is typically given in parentheses when reporting the results for a t test?

(Multiple Choice)

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Question 34

The related-samples t test is associated with no degrees of freedom.

(True/False)

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Question 35

A researcher records the time (in seconds)it takes participants to respond (by pressing a key)to a familiar and an unfamiliar word flashed onto a computer screen.In this study,the difference in response time for each participant is compared.The type of design described here is called a

(Multiple Choice)

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Question 36

A researcher selects a sample of 24 college students and has them rate their liking for two advertisements aimed at improving the image of the college.The researcher finds that liking ratings significantly differed,t = 2.900.Use $\omega$ ² to compute the proportion of variance for this result.

(Multiple Choice)

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Question 37

A researcher conditions rats to fear a tone that was sounded just prior to a brief shock.To measure fear following this conditioning,she records the number of lever presses by each rat in the presence and in the absence of the tone.It was hypothesized that reduced lever pressing in the presence of the tone was evidence for a conditioned fear response in rats.If the researcher tested this hypothesis at a .05 level of significance (two-tailed test),then what is her decision if she computes t = -2.842 in a sample of eight rats.

(Multiple Choice)

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Question 38

A professor computes the mean difference in exam scores before and after a lecture as 9.0 ± 14.5 (M_D± S_D),and this difference was significant.What is the effect size for this result using estimated Cohen's d?

(Multiple Choice)

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Question 39

The estimated standard error for difference scores is in the denominator of the test statistic for the related-samples t test.

(True/False)

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Question 40

Showing 21 - 40 of 80

A researcher records the strength of a conditioned response among 12 rats in the presence and absence of conditioned cues.If he computes a related-samples t test at a .05 level of significance (two-tailed test),then what are the critical values for this test?

Which of the following is an advantage for selecting related samples compared to selecting independent samples in behavioral research?

All other things being equal,as the degrees of freedom increase,what happens to the critical value for a related-samples t test (or for any t test,for that matter)?

A researcher matched 30 participants on intelligence (hence 15 pairs of participants)and then compared differences in emotional responsiveness to two experimental stimuli between each pair.For this test,what are the critical values,assuming a two-tailed test at a .05 level of significance?

A researcher compares the difference in the amount of texting by students in class during the first week and last week of classes.The type of design described here is called a

Using the same data,a related-samples t test has greater power than a two-independent-sample t test to detect an effect.

Selecting related samples increases standard error and reduces power.

The test statistic for a related-samples t test makes tests concerning a single sample of

All other things being equal,reducing the level of significance from .05 to .01 will ______ the value of the test statistic for a related-samples t test.

The degrees of freedom for the related-samples t test are the number of difference scores minus one.

Both estimates of proportion of variance, $\eta$ ² and $\omega$ ²,are computed the same for two-independent and related-samples t tests.

A researcher conducts a study in which the same participants are observed across each level of the independent variable.If there are only two levels of the independent variable,then what type of t test is appropriate for this study?

Using APA format,which value is typically given in parentheses when reporting the results for a t test?

The related-samples t test is associated with no degrees of freedom.

A researcher records the time (in seconds)it takes participants to respond (by pressing a key)to a familiar and an unfamiliar word flashed onto a computer screen.In this study,the difference in response time for each participant is compared.The type of design described here is called a

A researcher selects a sample of 24 college students and has them rate their liking for two advertisements aimed at improving the image of the college.The researcher finds that liking ratings significantly differed,t = 2.900.Use $\omega$ ² to compute the proportion of variance for this result.

A professor computes the mean difference in exam scores before and after a lecture as 9.0 ± 14.5 (M_D± S_D),and this difference was significant.What is the effect size for this result using estimated Cohen's d?

The estimated standard error for difference scores is in the denominator of the test statistic for the related-samples t test.

Introduction to Statistics

Summarizing Data: Frequency Distributions in Tables and Graphs

Summarizing Data: Central Tendency

Summarizing Data: Variability

Probability

Probability, normal Distributions, and Z Scores

Probability and Sampling Distributions

Hypothesis Testing: Significance,effect Size,and Power

Testing Means: One-Sample and Two-Independent-Sample T Tests

Estimation and Confidence Intervals

Analysis of Variance: One-Way Between-Subjects Design

Analysis of Variance: One-Way Within-Subjects Repeated-Measuresdesign

Analysis of Variance: Two-Way Between-Subjects Factorial Design

Correlation

Linear Regression and Multiple Regression

Nonparametric Tests: Chi-Square Tests

Nonparametric Tests: Tests for Ordinal Data

Filters

Exam 10: Testing Means: Truehe Related-Samples T Test

A researcher records the strength of a conditioned response among 12 rats in the presence and absence of conditioned cues.If he computes a related-samples t test at a .05 level of significance (two-tailed test),then what are the critical values for this test?

Which of the following is an advantage for selecting related samples compared to selecting independent samples in behavioral research?

All other things being equal,as the degrees of freedom increase,what happens to the critical value for a related-samples t test (or for any t test,for that matter)?

A researcher matched 30 participants on intelligence (hence 15 pairs of participants)and then compared differences in emotional responsiveness to two experimental stimuli between each pair.For this test,what are the critical values,assuming a two-tailed test at a .05 level of significance?

A researcher compares the difference in the amount of texting by students in class during the first week and last week of classes.The type of design described here is called a

Using the same data,a related-samples t test has greater power than a two-independent-sample t test to detect an effect.

Selecting related samples increases standard error and reduces power.

The test statistic for a related-samples t test makes tests concerning a single sample of

All other things being equal,reducing the level of significance from .05 to .01 will ______ the value of the test statistic for a related-samples t test.

The degrees of freedom for the related-samples t test are the number of difference scores minus one.

Both estimates of proportion of variance, η\etaη 2 and ω\omegaω 2,are computed the same for two-independent and related-samples t tests.

A researcher conducts a study in which the same participants are observed across each level of the independent variable.If there are only two levels of the independent variable,then what type of t test is appropriate for this study?

Using APA format,which value is typically given in parentheses when reporting the results for a t test?

The related-samples t test is associated with no degrees of freedom.

A researcher records the time (in seconds)it takes participants to respond (by pressing a key)to a familiar and an unfamiliar word flashed onto a computer screen.In this study,the difference in response time for each participant is compared.The type of design described here is called a

A researcher selects a sample of 24 college students and has them rate their liking for two advertisements aimed at improving the image of the college.The researcher finds that liking ratings significantly differed,t = 2.900.Use ω\omegaω 2 to compute the proportion of variance for this result.

A professor computes the mean difference in exam scores before and after a lecture as 9.0 ± 14.5 (MD ± SD),and this difference was significant.What is the effect size for this result using estimated Cohen's d?

The estimated standard error for difference scores is in the denominator of the test statistic for the related-samples t test.

Introduction to Statistics

Summarizing Data: Frequency Distributions in Tables and Graphs

Summarizing Data: Central Tendency

Summarizing Data: Variability

Probability

Probability, normal Distributions, and Z Scores

Probability and Sampling Distributions

Hypothesis Testing: Significance,effect Size,and Power

Testing Means: One-Sample and Two-Independent-Sample T Tests

Estimation and Confidence Intervals

Analysis of Variance: One-Way Between-Subjects Design

Analysis of Variance: One-Way Within-Subjects Repeated-Measuresdesign

Analysis of Variance: Two-Way Between-Subjects Factorial Design

Correlation

Linear Regression and Multiple Regression

Nonparametric Tests: Chi-Square Tests

Nonparametric Tests: Tests for Ordinal Data

Filters

Both estimates of proportion of variance, $\eta$ ² and $\omega$ ²,are computed the same for two-independent and related-samples t tests.

A researcher selects a sample of 24 college students and has them rate their liking for two advertisements aimed at improving the image of the college.The researcher finds that liking ratings significantly differed,t = 2.900.Use $\omega$ ² to compute the proportion of variance for this result.

A professor computes the mean difference in exam scores before and after a lecture as 9.0 ± 14.5 (M_D± S_D),and this difference was significant.What is the effect size for this result using estimated Cohen's d?