Question 1

If the effects of individual differences have not been removed from the raw scores,the eta2 for the correlated-groups case would be _____ than if they have been removed,everything else being equal.

Accepted Answer

A) no different 
B) smaller 
C) larger 
D) equal to or smaller

Question 2

What is the difference between eta-squared for the correlated groups t test and eta-squared for the independent groups t test?

Accepted Answer

The answer of What is the difference between eta-squared for...

Question 3

What is meant by the sensitivity of a statistical test?

Accepted Answer

The answer of What is meant by the sensitivity of...

Question 4

Which of the following conditions would preclude the use of a correlated-groups design?

Accepted Answer

A) small number of subjects 
B) the experimental manipulation has known carry-over effects 
C) the existence of individual differences 
D) the presence of disturbance variables

Question 5

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

Question 6

The major difference between the correlated groups t test and the independent groups t test is that the former is used when the independent variable is manipulated and the latter is used when the independent variable is observed.

Accepted Answer

A) True 
 B)False

Question 7

The correlated groups t test is _____ to violations of the normality assumption.

Accepted Answer

A) especially vulnerable 
B) relatively robust 
C) slightly robust 
D) none of these

Question 8

If we were to compute the average nullified score across conditions for each individual in a correlated groups study,we would find that every individual would have _____ average score(s).

Accepted Answer

A) the same 
B) different 
C) higher 
D) lower

Question 9

The dependent variable must be ____________________in nature if a correlated groups t-test is used.

Accepted Answer

The answer of The dependent variable must be ____________________in nature...

Question 10

Why is the correlated groups t test usually more powerful than the independent groups t test?

Accepted Answer

The answer of Why is the correlated groups t test...

Question 11

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

The answer of The ____________________in a correlated groups t-test is...

Question 12

There is less variability in a set of nullified scores because the effects of individual differences in background have been removed.

Accepted Answer

A) True 
 B)False

Question 13

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

Question 14

An important methodological problem to consider in a correlated-groups design is ______.

Accepted Answer

A) effects of individual differences 
B) the need for a larger sample compared to an independent-groups design 
C) the greater power of the test produces more Type I errors 
D) carry-over effects of the independent variable

Question 15

The degrees of freedom associated with correlated t-test is____________________.

Accepted Answer

The answer of The degrees of freedom associated with correlated...

Question 16

Although the correlated t test is usually a more powerful statistical test than the independent groups t test,one exception to this is

Accepted Answer

A) when r is so close to 0 that the magnitude of estimated standard errors is comparable in the two tests. 
B) when r is so close to 1 that the magnitude of estimated standard errors is comparable in the two tests. 
C) when the n in both groups is unequal. 
D) there are no exceptions to this statement.

Question 17

The correlated groups t-test is only used when the independent variable is____________________.

Accepted Answer

The answer of The correlated groups t-test is only used...

Question 18

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

Accepted Answer

A) True 
 B)False

Question 19

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

Question 20

The formula for computing eta-squared from t and its degrees of freedom for the correlated groups t test is the same as that for the independent groups t test.

Accepted Answer

A) True 
 B)False

Exam 11: Correlated Groups T-Test

If the effects of individual differences have not been removed from the raw scores,the eta² for the correlated-groups case would be _____ than if they have been removed,everything else being equal.

What is the difference between eta-squared for the correlated groups t test and eta-squared for the independent groups t test?

What is meant by the sensitivity of a statistical test?

Which of the following conditions would preclude the use of a correlated-groups design?

The major difference between the correlated groups t test and the independent groups t test is that the former is used when the independent variable is manipulated and the latter is used when the independent variable is observed.

The correlated groups t test is _____ to violations of the normality assumption.

If we were to compute the average nullified score across conditions for each individual in a correlated groups study,we would find that every individual would have _____ average score(s) .

The dependent variable must be ____________________in nature if a correlated groups t-test is used.

Why is the correlated groups t test usually more powerful than the independent groups t test?

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.

There is less variability in a set of nullified scores because the effects of individual differences in background have been removed.

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

An important methodological problem to consider in a correlated-groups design is ______.

The degrees of freedom associated with correlated t-test is____________________.

Although the correlated t test is usually a more powerful statistical test than the independent groups t test,one exception to this is

The correlated groups t-test is only used when the independent variable is____________________.

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

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

The formula for computing eta-squared from t and its degrees of freedom for the correlated groups t test is the same as that for the independent groups t test.