Question 16 For a repeated-measures study comparing two treatment conditions, a

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Question 16

For a repeated-measures study comparing two treatment conditions, a researcher obtains Cohen’s d = 0.50 for a sample of n = 4 scores with a variance of s2 = 16. What is the value of the sample mean?

A. MD = 4

B. MD = 2

C. MD = 16

D. MD = 8

Question 17

The null hypothesis for a repeated-measures test states:

A. All of the other options are correct.

B. The overall sample will have a mean difference of MD = 0.

C. Each individual will have a difference score of D = 0.

D. The entire population will have a mean difference of mD = 0.

Question 18

A researcher reports t(12) = 2.86, p < .05 for a repeated-measures research study. How many individuals participated in the study?

A. n = 11

B. n = 25

C. n = 13

D. n = 24

Question 19   

A research report describing the results from a repeated-measures study states: The data show no significant difference between the two treatments, t(10) = 1.65, p > .05. Based on this report, you can conclude that a total of ____ individuals participated in the research study .

A. 10

B. 11

C. 9

D. 12

Question 20

Compared to an independent-measures design, a repeated-measured study is more likely to find a significant effect because it reduces the contribution of variance due to ____.

A. MD

B. individual differences

C. the effect of the treatment

D. degrees of freedom

Explanation / Answer

16. B. MD = 2

17. D. The entire population will have a mean difference of mD = 0.

18. C. n = 13

19. B.11

20. B. individual differences

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