Chapter 12 - Inferences about Means of Two Dependent Samples

Question 1

What are two dependent samples?

Answer 1

Two samples whose subjects are statistically related to each other.

Question 2

What is a repeated measures design?

Answer 2

An experimental design where each subject is measured twice, once before and again after some treatment.

Question 3

What are three common dependent sample designs?

Answer 3

Repeated measures, related samples, matched pairs.

Question 4

What is the difference-score?

Answer 4

A subject’s score in one condition minus that same subject’s (or related subject’s) score in the other condition.

Question 5

What is the standard error of the mean of the differences?

Answer 5

Te standard deviation of the distribution that would result from taking a random sample, measuring each member twice, computing difference scores for each member of the sample, and computing the mean of the difference of the scores for the sample; and then repeating the process indefinitely often.

Question 6

What are the measures of practical signficance?

Answer 6

The raw effect size and the effect size.

Question 7

Can the same data that are used for a dependent samples t test could also be used for an independent samples t test?

Answer 7

Yes.

Question 8

Is the dependent samples test is more powerful than an independent samples test?

Answer 8

Yes to the extent that the data are strongly related.