Question 1

If the sample size is less than 15,the correlated groups t test may show inflated Type I errors for data that are:

Accepted Answer

A) normally distributed 
B) cross-sectional 
C) markedly skewed 
D) markedly kurtotic 
A) normally distributed 
B) cross-sectional 
C) markedly skewed 
D) markedly kurtotic C

Question 2

After analyze data using a correlated groups t-test the nature of the relationship is determined by comparing the mean scores in the 2 conditions.

Accepted Answer

A) True 
 B)False  True

Question 3

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,sampling error will be large and even strong effects may go undetected as a result of lower statistical power.

Question 4

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 5

The correlated groups t test provides a less sensitive test of the relationship between the independent and dependent variables than does the independent groups t test.

Accepted Answer

A) True 
 B)False

Question 6

One procedure for venly distributing carry-over effects across conditions is called counterbalancing.

Accepted Answer

A) True 
 B)False

Question 7

In a correlated-groups t test,eta2 represents the proportion of variability in the dependent variable that is associated with the independent variable ______.

Accepted Answer

A) before the variability due to individual differences has been removed 
B) after the variability due to individual differences has been added 
C) after the variance has been divided by df 
D) after variability due to individual differences has been removed 
A) before the variability due to individual differences has been removed 
B) after the variability due to individual differences has been added 
C) after the variance has been divided by df 
D) after variability due to individual differences has been removed

Question 8

Dr.Miguel is studying stages of verbal ability in kids.He test the kids on verbal ability at age 5 years then again at age of 7.What type of statistical test should he use to analyze his data?

Accepted Answer

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

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 is the nature of the relationship in Dr.Augusts' research?

Accepted Answer

A) when women received praise they had more job satisfaction 
B) when women received a gift card they had more job satisfaction 
C) she has a type II error so the results are not conclusive 
D) the independent variable had no affect on job satisfaction 
E) both c & d 
A) when women received praise they had more job satisfaction 
B) when women received a gift card they had more job satisfaction 
C) she has a type II error so the results are not conclusive 
D) the independent variable had no affect on job satisfaction 
E) both c & d

Question 10

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.If Dr.Hinson fails to implement the appropriate changes to his experiment a potential confound may be_____.

Accepted Answer

A) order effects 
B) disturbance variance 
C) ceiling effect 
D) Both a & b 
A) order effects 
B) disturbance variance 
C) ceiling effect 
D) Both a & b

Question 11

In the correlated groups case,eta-squared represents the proportion of variability in the dependent variable that is associated with the independent variable after the variability due to _____ has been removed.

Accepted Answer

A) correlated errors 
B) individual differences 
C) all disturbance variables 
D) nullified scores 
A) correlated errors 
B) individual differences 
C) all disturbance variables 
D) nullified scores

Question 12

As the sample size increases in a correlated groups t-test in theory the sampling distribution of the mean of difference scores should____________________.

Accepted Answer

The answer of As the sample size increases in a...

Question 13

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

Accepted Answer

A) True 
 B)False

Question 14

When the population means in the two conditions defining the difference scores are _____,the mean difference score across all individuals in the population will equal _____.

Accepted Answer

A) equivalent;0 
B) nonequivalent;0 
C) equivalent;1.0 
D) none of these 
A) equivalent;0 
B) nonequivalent;0 
C) equivalent;1.0 
D) none of these

Question 15

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

Accepted Answer

A sampling distribution of the mean of d

Question 16

Usually,the correlated groups t test provides a _____ test of the relationship between the independent and dependent variables than does the independent groups t test.

Accepted Answer

A) more sensitive 
B) less sensitive 
C) statistically significant 
D) nullified 
A) more sensitive 
B) less sensitive 
C) statistically significant 
D) nullified

Question 17

What are the assumptions of the correlated groups t test?

Accepted Answer

The assumptions are (1)the sam

Question 18

A correlated groups t-test is used when_____.

Accepted Answer

A) the independent variable is between subjects 
B) the independent variable is within subjects 
C) when subjects are matched on a particular variable 
D) Both b & c 
E) all of these 
A) the independent variable is between subjects 
B) the independent variable is within subjects 
C) when subjects are matched on a particular variable 
D) Both b & c 
E) all of these

Question 19

The sampling distribution of the mean of difference scores indicates the amount of____________________.

Accepted Answer

difference

Question 20

The main difference between a correlated groups t-test and Independent groups t-test include(s)_____.

Accepted Answer

A) an independent groups t-test assumes the distribution is normal 
B) the correlated groups t-test assumes the independent variable is within subjects 
C) the correlated groups t-test assumes the population mean is known 
D) the independent groups t-test assumes the population means is known 
E) none of these 
A) an independent groups t-test assumes the distribution is normal 
B) the correlated groups t-test assumes the independent variable is within subjects 
C) the correlated groups t-test assumes the population mean is known 
D) the independent groups t-test assumes the population means is known 
E) none of these

If the sample size is less than 15,the correlated groups t test may show inflated Type I errors for data that are:

After analyze data using a correlated groups t-test the nature of the relationship is determined by comparing the mean scores in the 2 conditions.

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.

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

The correlated groups t test provides a less sensitive test of the relationship between the independent and dependent variables than does the independent groups t test.

One procedure for venly distributing carry-over effects across conditions is called counterbalancing.

In a correlated-groups t test,eta² represents the proportion of variability in the dependent variable that is associated with the independent variable ______.

Dr.Miguel is studying stages of verbal ability in kids.He test the kids on verbal ability at age 5 years then again at age of 7.What type of statistical test should he use to analyze his data?

In the correlated groups case,eta-squared represents the proportion of variability in the dependent variable that is associated with the independent variable after the variability due to _____ has been removed.

As the sample size increases in a correlated groups t-test in theory the sampling distribution of the mean of difference scores should____________________.

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

When the population means in the two conditions defining the difference scores are _,the mean difference score across all individuals in the population will equal _.

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

Usually,the correlated groups t test provides a _____ test of the relationship between the independent and dependent variables than does the independent groups t test.

What are the assumptions of the correlated groups t test?

A correlated groups t-test is used when_____.

The sampling distribution of the mean of difference scores indicates the amount of____________________.

The main difference between a correlated groups t-test and Independent groups t-test include(s)_____.

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

If the sample size is less than 15,the correlated groups t test may show inflated Type I errors for data that are:

After analyze data using a correlated groups t-test the nature of the relationship is determined by comparing the mean scores in the 2 conditions.

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.

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

The correlated groups t test provides a less sensitive test of the relationship between the independent and dependent variables than does the independent groups t test.

One procedure for venly distributing carry-over effects across conditions is called counterbalancing.

In a correlated-groups t test,eta2 represents the proportion of variability in the dependent variable that is associated with the independent variable ______.

Dr.Miguel is studying stages of verbal ability in kids.He test the kids on verbal ability at age 5 years then again at age of 7.What type of statistical test should he use to analyze his data?

In the correlated groups case,eta-squared represents the proportion of variability in the dependent variable that is associated with the independent variable after the variability due to _____ has been removed.

As the sample size increases in a correlated groups t-test in theory the sampling distribution of the mean of difference scores should____________________.

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

When the population means in the two conditions defining the difference scores are _____,the mean difference score across all individuals in the population will equal _____.

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

Usually,the correlated groups t test provides a _____ test of the relationship between the independent and dependent variables than does the independent groups t test.

What are the assumptions of the correlated groups t test?

A correlated groups t-test is used when_____.

The sampling distribution of the mean of difference scores indicates the amount of____________________.

The main difference between a correlated groups t-test and Independent groups t-test include(s)_____.

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

In a correlated-groups t test,eta² represents the proportion of variability in the dependent variable that is associated with the independent variable ______.

When the population means in the two conditions defining the difference scores are _,the mean difference score across all individuals in the population will equal _.