Question 1

Compared to the two-independent sample t test,the related samples design decreases

Accepted Answer

A) power 
B) effect size 
C) standard error 
D) significance 
A) power 
B) effect size 
C) standard error 
D) significance

Question 2

The denominator of the test statistic for a related samples t test

Accepted Answer

A) compares mean differences observed to the mean differences stated in a null hypothesis 
B) is the sum of the difference scores for each participant 
C) provides an estimate of the error associated with the original scores 
D) provides an estimate of the error associated with the difference scores 
A) compares mean differences observed to the mean differences stated in a null hypothesis 
B) is the sum of the difference scores for each participant 
C) provides an estimate of the error associated with the original scores 
D) provides an estimate of the error associated with the difference scores

Question 3

A researcher selects a sample of 36 dog owners and measures their responsiveness to pictures depicting the humane and inhumane treatment of dogs.The researcher finds that responsiveness significantly differed,t = 3.243.Use eta-squared to compute the proportion of variance for this result.

Accepted Answer

A)    = 0.21 
B)    = 0.23 
C)    = 0.25 
D) There is not enough information to answer this question. 
A)    = 0.21 
B)    = 0.23 
C)    = 0.25 
D) There is not enough information to answer this question.

Question 4

The repeated measures design,but not the matched-pairs design,is associated with greater power to detect an effect compared with the independent samples design.

Accepted Answer

A) True 
 B)False

Question 5

A researcher asks a sample of brothers and sisters to rate how positive their family environment was during childhood.In this study,the differences in ratings between each brother and sister pair were compared.The type of design described here is called a

Accepted Answer

A) repeated measures design 
B) matched samples design 
C) both A and B 
A) repeated measures design 
B) matched samples design 
C) both A and B

Question 6

The related samples t test makes tests concerning the difference between pairs of measured scores.

Accepted Answer

A) True 
 B)False

Question 7

The assumptions for a related samples t test apply to both the repeated measures and matched-pairs designs.

Accepted Answer

A) True 
 B)False

Question 8

A researcher records the level of attention among 18 students during an interactive and lecture portion of a single class.If she computes a related samples t test at a .05 level of significance (two-tailed test),then what is the critical value for this test?

Accepted Answer

A) ±1.734 
B) ±1.740 
C) ±2.110 
D) ±2.101 
A) ±1.734 
B) ±1.740 
C) ±2.110 
D) ±2.101

Question 9

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-squared to compute the proportion of variance for this result.

Accepted Answer

A)    = 0.29 
B)    = 0.24 
C)    = 0.21 
D) There is not enough information to answer this question. 
A)    = 0.29 
B)    = 0.24 
C)    = 0.21 
D) There is not enough information to answer this question.

Question 10

To compute the related samples t test,we assume independence within groups,but not between groups.

Accepted Answer

A) True 
 B)False

Question 11

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?

Accepted Answer

A) ±2.042 
B) ±2.045 
C) ±2.131 
D) ±2.145 
A) ±2.042 
B) ±2.045 
C) ±2.131 
D) ±2.145

Question 12

A researcher tests how well participants know their spouse while under hypnosis,and again without hypnosis.It was hypothesized that participant responses would be more accurate (greater number of correct responses)when under hypnosis.The mean number of correct responses was M = 5.30 under hypnosis and M = 3.40 without hypnosis in a sample of 30 participants.If the estimated standard error for difference scores was 2.52,then what is the decision at a .05 level of significance (two-tailed test)?

Accepted Answer

A) Retain the null hypothesis;responses were more accurate under hypnosis. 
B) Retain the null hypothesis;responses were not more accurate under hypnosis. 
C) Reject the null hypothesis;responses were more accurate under hypnosis. 
D) Reject the null hypothesis;responses were not more accurate under hypnosis. 
A) Retain the null hypothesis;responses were more accurate under hypnosis. 
B) Retain the null hypothesis;responses were not more accurate under hypnosis. 
C) Reject the null hypothesis;responses were more accurate under hypnosis. 
D) Reject the null hypothesis;responses were not more accurate under hypnosis.

Question 13

A researcher conducts a study in which different participants are independently observed within groups,and the same participants are observed between groups.If there are only two groups,then what type of t test is appropriate for this study?

Accepted Answer

A) one-sample t test 
B) two-independent sample t test 
C) related samples t test 
D) There is not enough information to answer this question. 
A) one-sample t test 
B) two-independent sample t test 
C) related samples t test 
D) There is not enough information to answer this question.

Question 14

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)?

Accepted Answer

A) The critical value increases. 
B) The critical value decreases. 
C) The critical value does not change. 
D) It depends on the value of the test statistic. 
A) The critical value increases. 
B) The critical value decreases. 
C) The critical value does not change. 
D) It depends on the value of the test statistic.

Question 15

To compute a related samples t test,a researcher has to know many values.Which of the following is NOT a value that the researcher must know to compute this test?

Accepted Answer

A) the estimated standard error for difference scores 
B) the population variance of difference scores 
C) the sample size or number of pairs of scores 
D) the sample variance of difference scores 
A) the estimated standard error for difference scores 
B) the population variance of difference scores 
C) the sample size or number of pairs of scores 
D) the sample variance of difference scores

Question 16

A researcher sampled 16 couples and measured the mean difference in their marital satisfaction.Each couple was paired and the differences in their ratings (on a 7-point scale)were taken.If the mean difference in satisfaction ratings for this sample was 1.8±2.0 (   ),then what is the decision at a .05 level of significance?

Accepted Answer

A) Satisfaction ratings do not significantly differ,t(14)= 0.90. 
B) Satisfaction ratings do not significantly differ,t(15)= 0.90. 
C) Satisfaction ratings significantly differ,t(14)= 3.60. 
D) Satisfaction ratings significantly differ,t(15)= 3.60. 
A) Satisfaction ratings do not significantly differ,t(14)= 0.90. 
B) Satisfaction ratings do not significantly differ,t(15)= 0.90. 
C) Satisfaction ratings significantly differ,t(14)= 3.60. 
D) Satisfaction ratings significantly differ,t(15)= 3.60.

Question 17

Each of the following is needed to compute the estimated Cohen's d,except

Accepted Answer

A) the mean difference 
B) the standard error 
C) the standard deviation of difference scores 
A) the mean difference 
B) the standard error 
C) the standard deviation of difference scores

Question 18

A researcher computes a related samples t test with t(20)= 2.096.In this example,the decision is to reject the null hypothesis for a one-tailed test,but not for a two-tailed test.

Accepted Answer

A) True 
 B)False

Question 19

A researcher computes d = .12,which is a small effect size.

Accepted Answer

A) True 
 B)False

Compared to the two-independent sample t test,the related samples design decreases

The denominator of the test statistic for a related samples t test

A researcher selects a sample of 36 dog owners and measures their responsiveness to pictures depicting the humane and inhumane treatment of dogs.The researcher finds that responsiveness significantly differed,t = 3.243.Use eta-squared to compute the proportion of variance for this result.

The repeated measures design,but not the matched-pairs design,is associated with greater power to detect an effect compared with the independent samples design.

A researcher asks a sample of brothers and sisters to rate how positive their family environment was during childhood.In this study,the differences in ratings between each brother and sister pair were compared.The type of design described here is called a

The related samples t test makes tests concerning the difference between pairs of measured scores.

The assumptions for a related samples t test apply to both the repeated measures and matched-pairs designs.

A researcher records the level of attention among 18 students during an interactive and lecture portion of a single class.If she computes a related samples t test at a .05 level of significance (two-tailed test),then what is the critical value for this test?

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-squared to compute the proportion of variance for this result.

To compute the related samples t test,we assume independence within groups,but not between groups.

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 conducts a study in which different participants are independently observed within groups,and the same participants are observed between groups.If there are only two groups,then what type of t test is appropriate for this study?

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)?

To compute a related samples t test,a researcher has to know many values.Which of the following is NOT a value that the researcher must know to compute this test?

Each of the following is needed to compute the estimated Cohen's d,except

A researcher computes a related samples t test with t(20)= 2.096.In this example,the decision is to reject the null hypothesis for a one-tailed test,but not for a two-tailed test.

A researcher computes d = .12,which is a small effect size.

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 Measures Design

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: Related Samples T Test

Compared to the two-independent sample t test,the related samples design decreases

The denominator of the test statistic for a related samples t test

A researcher selects a sample of 36 dog owners and measures their responsiveness to pictures depicting the humane and inhumane treatment of dogs.The researcher finds that responsiveness significantly differed,t = 3.243.Use eta-squared to compute the proportion of variance for this result.

The repeated measures design,but not the matched-pairs design,is associated with greater power to detect an effect compared with the independent samples design.

A researcher asks a sample of brothers and sisters to rate how positive their family environment was during childhood.In this study,the differences in ratings between each brother and sister pair were compared.The type of design described here is called a

The related samples t test makes tests concerning the difference between pairs of measured scores.

The assumptions for a related samples t test apply to both the repeated measures and matched-pairs designs.

A researcher records the level of attention among 18 students during an interactive and lecture portion of a single class.If she computes a related samples t test at a .05 level of significance (two-tailed test),then what is the critical value for this test?

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-squared to compute the proportion of variance for this result.

To compute the related samples t test,we assume independence within groups,but not between groups.

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 conducts a study in which different participants are independently observed within groups,and the same participants are observed between groups.If there are only two groups,then what type of t test is appropriate for this study?

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)?

To compute a related samples t test,a researcher has to know many values.Which of the following is NOT a value that the researcher must know to compute this test?

Each of the following is needed to compute the estimated Cohen's d,except

A researcher computes a related samples t test with t(20)= 2.096.In this example,the decision is to reject the null hypothesis for a one-tailed test,but not for a two-tailed test.

A researcher computes d = .12,which is a small effect size.

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 Measures Design

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