Question 1

The mean of the sampling distribution of mean difference scores is equal to the mean difference score across individuals in the population.

Accepted Answer

A) True 
 B)False

Question 2

Dr.Hinson wants to investigate if rats fed a diet enriched with omega will do better at a maze learning task then when these same rats are given a normal diet.He has a total of 30 rats for his experiment.What should Dr.Hinson do before he starts his experiment?

Accepted Answer

A) counterbalance the diet so 15 rats receive omega then normal chow and 15 normal chow then omega diet 
B) raise them on the appropriate omega diet before starting his experiment 
C) measuring the speed of each rat can run before implementing the independent variable 
D) All of these 
A) counterbalance the diet so 15 rats receive omega then normal chow and 15 normal chow then omega diet 
B) raise them on the appropriate omega diet before starting his experiment 
C) measuring the speed of each rat can run before implementing the independent variable 
D) All of these

Question 3

The standard deviation of the sampling distribution of mean difference scores is referred to as the _____ of difference scores.

Accepted Answer

A) mean difference 
B) variance 
C) standard error of the mean 
D) sampling error 
A) mean difference 
B) variance 
C) standard error of the mean 
D) sampling error

Question 4

Using Appendix

Accepted Answer

A) 87 
B) 36 
C) 53 
D) 23 
E) 1,find the sample size that is need to detect a population eta2 of .10,with a power of.80 and á=.05,nondirectional test. 
A) 87 
B) 36 
C) 53 
D) 23 
E) 1,find the sample size that is need to detect a population eta2 of .10,with a power of.80 and á=.05,nondirectional test.

Question 5

If a correlated-groups t test found significant differences due to the independent variable,which of the following procedures would clarify the nature of the relationship?

Accepted Answer

A) removing the effects of individual differences 
B) eta2 
C) the p value 
D) examination of the means of each condition 
A) removing the effects of individual differences 
B) eta2 
C) the p value 
D) examination of the means of each condition

Question 6

Unlike the independent groups t test,larger sample sizes will not increase the power of the correlated groups t test.

Accepted Answer

A) True 
 B)False

Question 7

If your calculated t statistic was t(30)= 6.23,you would most likely decide to _____.

Accepted Answer

A) accept the null 
B) reject the H0 
C) fail to reject the H0 
D) reject the H1 
A) accept the null 
B) reject the H0 
C) fail to reject the H0 
D) reject the H1

Question 8

If a researcher used a matched-subjects design,which of the following statistical tests should be used?

Accepted Answer

A) correlated-groups t test 
B) independent-groups t test 
C) two-sample independent z test 
D) Pearson correlation 
A) correlated-groups t test 
B) independent-groups t test 
C) two-sample independent z test 
D) Pearson correlation

Question 9

When is the correlated groups t test used to analyze the relationship between two variables?

Accepted Answer

The correlated groups t test is typicall

Question 10

In the correlated groups t test,eta-squared represents the proportion of variability in the dependent variable that is associated with the independent variable after variability due to individual differences has been included.

Accepted Answer

A) True 
 B)False

Question 11

Dr.August is investigating whether or not women have more job satisfaction after they are given praise or a gift card (different levels or rewards).She has recruited 10 women from Intel and for 6 months the women received praise then the next 6 months they received a gift card.The conditions were counterbalanced and a survey on job satisfaction was distributed following the treatment conditions or every 6 months until the research was completed.After finishing her study Dr.August was busy writing a grant,therefore she has asked you to analyze her data below.Please note the survey was based on 1-5 Likert scale with high scores indicating high job satisfaction and low score indicating dissatisfaction.  
What is the calculated t-value for Dr.Augusts' data above?

Accepted Answer

A) 5.70 
B) 6.00 
C) 5.88 
D) 1.90 
A) 5.70 
B) 6.00 
C) 5.88 
D) 1.90

Question 12

The ____________________in a correlated groups t-test is similar to the sampling distribution of the difference between two independent means in a independent groups t-test.

Accepted Answer

Sampling distributio

Question 13

If we were to compute the average nullified score for each research participant,we would find that every person would have the same average score.

Accepted Answer

A) True 
 B)False

Question 14

In most behavioral science research the estimated standard error for a correlated groups t test is _____than the estimated standard error for the independent groups t test.

Accepted Answer

A) the same 
B) larger 
C) smaller 
D) sometimes larger,sometimes smaller,depending on the N 
A) the same 
B) larger 
C) smaller 
D) sometimes larger,sometimes smaller,depending on the N

Question 15

Based on the Method of Presentation section of Chapter 11,suppose a researcher is reporting the results of a correlated groups t test.If she obtained a t value of 2.17 with 10 subjects in each group using an alpha level of .05 and a nondirectional test,how would she report this in a psychological journal?

Accepted Answer

A) t (9)= 2.17,p  .05 
C) t (18)= 2.17,p  .05 
A) t (9)= 2.17,p  .05 
C) t (18)= 2.17,p  .05

Question 16

A reading readiness test is administered to 8 matched pairs of first graders.One child of each pair had 3 years of day care experience whereas the other child had none.The results of the test are shown in the following table.(Higher scores indicate greater readiness. )Assume á=.05,nondirectional test.  
The calculated t for this problem is _____.

Accepted Answer

A) .97 
B) 2.65 
C) .39 
D) 1.88 
A) .97 
B) 2.65 
C) .39 
D) 1.88

Question 17

The correlated groups t test is typically used to analyze the relationship between two variables when:

Accepted Answer

A) the independent variable is quantitative in nature and is measured on a level that at least approximates interval characteristics 
B) the independent variable is within-subjects in nature 
C) the independent variable has two and only two levels 
D) all of these 
A) the independent variable is quantitative in nature and is measured on a level that at least approximates interval characteristics 
B) the independent variable is within-subjects in nature 
C) the independent variable has two and only two levels 
D) all of these

Question 18

A sampling distribution of the mean of difference scores can be defined as a _____ distribution consisting of mean difference scores across individuals for all possible random samples of a given size that could be selected from a population.

Accepted Answer

A) skewed 
B) bimodal 
C) normal 
D) theoretical 
A) skewed 
B) bimodal 
C) normal 
D) theoretical

Question 19

A reading readiness test is administered to 8 matched pairs of first graders.One child of each pair had 3 years of day care experience whereas the other child had none.The results of the test are shown in the following table.(Higher scores indicate greater readiness. )Assume á=.05,nondirectional test.  
The df for this problem is _______.

Accepted Answer

A) 14 
B) 6 
C) 7 
D) 12 
A) 14 
B) 6 
C) 7 
D) 12

Question 20

Since variability due to individual differences is extracted from the dependent variable as part of the correlated groups t test procedure,a correlated groups t test will usually be more powerful than a corresponding independent groups t test.

Accepted Answer

A) True 
 B)False

The mean of the sampling distribution of mean difference scores is equal to the mean difference score across individuals in the population.

Dr.Hinson wants to investigate if rats fed a diet enriched with omega will do better at a maze learning task then when these same rats are given a normal diet.He has a total of 30 rats for his experiment.What should Dr.Hinson do before he starts his experiment?

The standard deviation of the sampling distribution of mean difference scores is referred to as the _____ of difference scores.

Using Appendix

If a correlated-groups t test found significant differences due to the independent variable,which of the following procedures would clarify the nature of the relationship?

Unlike the independent groups t test,larger sample sizes will not increase the power of the correlated groups t test.

If your calculated t statistic was t(30)= 6.23,you would most likely decide to _____.

If a researcher used a matched-subjects design,which of the following statistical tests should be used?

When is the correlated groups t test used to analyze the relationship between two variables?

In the correlated groups t test,eta-squared represents the proportion of variability in the dependent variable that is associated with the independent variable after variability due to individual differences has been included.

The ____________________in a correlated groups t-test is similar to the sampling distribution of the difference between two independent means in a independent groups t-test.

If we were to compute the average nullified score for each research participant,we would find that every person would have the same average score.

In most behavioral science research the estimated standard error for a correlated groups t test is _____than the estimated standard error for the independent groups t test.

The correlated groups t test is typically used to analyze the relationship between two variables when:

A sampling distribution of the mean of difference scores can be defined as a _____ distribution consisting of mean difference scores across individuals for all possible random samples of a given size that could be selected from a population.

Since variability due to individual differences is extracted from the dependent variable as part of the correlated groups t test procedure,a correlated groups t test will usually be more powerful than a corresponding independent groups t test.

Introduction and Mathematical Preliminaries

Frequency and Probability Distributions

Measures of Central Tendency and Variability

Percentiles,percentile Ranks,standard Scores,and the Normal Distribution

Pearson Correlation and Regression: Descriptive Aspects

Probability

Estimation and Sampling Distributions

Hypothesis Testing: Inferences About a Single Mean

Principles of Research Design and Statistical Preliminaries for Analyzing Bivariate Relationships

Independent Groups T-Test

One-Way Repeated Measures Analysis of Variance

Pearson Correlation and Regression: Inferential Aspects

Chi-Square Test

Nonparametric Statistics

Two-Way Between-Subjects Analysis of Variance

Overview and Extension: Statistical Tests for More Complex Designs

Filters

Exam 11: Correlated Groups T-Test

The mean of the sampling distribution of mean difference scores is equal to the mean difference score across individuals in the population.

Dr.Hinson wants to investigate if rats fed a diet enriched with omega will do better at a maze learning task then when these same rats are given a normal diet.He has a total of 30 rats for his experiment.What should Dr.Hinson do before he starts his experiment?

The standard deviation of the sampling distribution of mean difference scores is referred to as the _____ of difference scores.

Using Appendix

If a correlated-groups t test found significant differences due to the independent variable,which of the following procedures would clarify the nature of the relationship?

Unlike the independent groups t test,larger sample sizes will not increase the power of the correlated groups t test.

If your calculated t statistic was t(30)= 6.23,you would most likely decide to _____.

If a researcher used a matched-subjects design,which of the following statistical tests should be used?

When is the correlated groups t test used to analyze the relationship between two variables?

In the correlated groups t test,eta-squared represents the proportion of variability in the dependent variable that is associated with the independent variable after variability due to individual differences has been included.

The ____________________in a correlated groups t-test is similar to the sampling distribution of the difference between two independent means in a independent groups t-test.

If we were to compute the average nullified score for each research participant,we would find that every person would have the same average score.

In most behavioral science research the estimated standard error for a correlated groups t test is _____than the estimated standard error for the independent groups t test.

The correlated groups t test is typically used to analyze the relationship between two variables when:

A sampling distribution of the mean of difference scores can be defined as a _____ distribution consisting of mean difference scores across individuals for all possible random samples of a given size that could be selected from a population.

Since variability due to individual differences is extracted from the dependent variable as part of the correlated groups t test procedure,a correlated groups t test will usually be more powerful than a corresponding independent groups t test.

Introduction and Mathematical Preliminaries

Frequency and Probability Distributions

Measures of Central Tendency and Variability

Percentiles,percentile Ranks,standard Scores,and the Normal Distribution

Pearson Correlation and Regression: Descriptive Aspects

Probability

Estimation and Sampling Distributions

Hypothesis Testing: Inferences About a Single Mean

Principles of Research Design and Statistical Preliminaries for Analyzing Bivariate Relationships

Independent Groups T-Test

One-Way Repeated Measures Analysis of Variance

Pearson Correlation and Regression: Inferential Aspects

Chi-Square Test

Nonparametric Statistics

Two-Way Between-Subjects Analysis of Variance

Overview and Extension: Statistical Tests for More Complex Designs

Filters