Question 1

A correlated groups t test is analogous to an independent groups t test with the effects of individual differences extracted from the dependent variable.

Accepted Answer

A) True 
 B)False

Question 2

What are the assumptions of the correlated groups t test?

Accepted Answer

The assumptions are (1)the sam

Question 3

What is a sampling distribution of the mean of difference scores?

Accepted Answer

A sampling distribution of the mean of d

Question 4

Explain why it is possible to observe a strong relationship between two variables based on the value of eta-squared without obtaining a statistically significant t value.

Accepted Answer

With small sample sizes,sampli

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

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 7

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 8

The correlated groups t test has N - 2 degrees of freedom associated with it.

Accepted Answer

A) True 
 B)False

Question 9

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 should be done after the inference about the relationship has been determined?

Accepted Answer

A) eta-squared should be calculated 
B) confidence intervals should be determined 
C) a methods section should be written 
D) None of these 
A) eta-squared should be calculated 
B) confidence intervals should be determined 
C) a methods section should be written 
D) None of these

Question 10

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 eta2 for the "reading readiness" data is _____.

Accepted Answer

A) .31 
B) .23 
C) .54 
D) .44 
A) .31 
B) .23 
C) .54 
D) .44

Question 11

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 12

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

Question 13

If the researcher suspects that the strength of the relationship between two variables in the population is .25,what sample size should she use per group in a study involving two correlated groups and an alpha level of .05,directional test,in order to achieve a power of .90?

Accepted Answer

A) 14 
B) 17 
C) 21 
D) 24 
A) 14 
B) 17 
C) 21 
D) 24

Question 14

Only the independent groups t-test assumes the dependent variable is quantitative in nature at an interval scale.

Accepted Answer

A) True 
 B)False

Question 15

The calculation of ____________________is similar in both the correlated and independent groups t-test.

Accepted Answer

The answer of The calculation of ____________________is similar in both...

Question 16

A major advantage of correlated groups t-test over an independent groups t-test is associated with the control of____________________.

Accepted Answer

disturbanc

Question 17

In the correlated groups t test,the relevant t distribution has _____ degrees of freedom associated with it.

Accepted Answer

A) N 
B) N -1 
C) N - 2 
D) 0 
A) N 
B) N -1 
C) N - 2 
D) 0

Question 18

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 19

An important advantage of the correlated groups t test over the independent groups t test relates to the control of:

Accepted Answer

A) random assignment 
B) disturbance variables 
C) confounding variables 
D) all of these 
A) random assignment 
B) disturbance variables 
C) confounding variables 
D) all of these

Question 20

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 statistical test should be used to analyze Dr.Augusts' data?

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

A correlated groups t test is analogous to an independent groups t test with the effects of individual differences extracted from the dependent variable.

What are the assumptions of the correlated groups t test?

What is a sampling distribution of the mean of difference scores?

Explain why it is possible to observe a strong relationship between two variables based on the value of eta-squared without obtaining a statistically significant t value.

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?

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.

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

The correlated groups t test has N - 2 degrees of freedom associated with it.

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.

If the researcher suspects that the strength of the relationship between two variables in the population is .25,what sample size should she use per group in a study involving two correlated groups and an alpha level of .05,directional test,in order to achieve a power of .90?

Only the independent groups t-test assumes the dependent variable is quantitative in nature at an interval scale.

The calculation of ____________________is similar in both the correlated and independent groups t-test.

A major advantage of correlated groups t-test over an independent groups t-test is associated with the control of____________________.

In the correlated groups t test,the relevant t distribution has _____ degrees of freedom associated with it.

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

An important advantage of the correlated groups t test over the independent groups t test relates to the control of:

Introduction and Mathematical Preliminaries

Frequency and Probability Distributions

Percentiles percentile Ranks standard Scores and the Normal Distribution

Pearson Correlation and Regression: Descriptive Aspects

Measures of Central Tendency and Variability

Estimation and Sampling Distributions

Hypothesis Testing: Inferences About a Single Mean

Probability

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

A correlated groups t test is analogous to an independent groups t test with the effects of individual differences extracted from the dependent variable.

What are the assumptions of the correlated groups t test?

What is a sampling distribution of the mean of difference scores?

Explain why it is possible to observe a strong relationship between two variables based on the value of eta-squared without obtaining a statistically significant t value.

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?

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.

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

The correlated groups t test has N - 2 degrees of freedom associated with it.

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.

If the researcher suspects that the strength of the relationship between two variables in the population is .25,what sample size should she use per group in a study involving two correlated groups and an alpha level of .05,directional test,in order to achieve a power of .90?

Only the independent groups t-test assumes the dependent variable is quantitative in nature at an interval scale.

The calculation of ____________________is similar in both the correlated and independent groups t-test.

A major advantage of correlated groups t-test over an independent groups t-test is associated with the control of____________________.

In the correlated groups t test,the relevant t distribution has _____ degrees of freedom associated with it.

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

An important advantage of the correlated groups t test over the independent groups t test relates to the control of:

Introduction and Mathematical Preliminaries

Frequency and Probability Distributions

Percentiles percentile Ranks standard Scores and the Normal Distribution

Pearson Correlation and Regression: Descriptive Aspects

Measures of Central Tendency and Variability

Estimation and Sampling Distributions

Hypothesis Testing: Inferences About a Single Mean

Probability

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