11. For which of the following situations would arepeated-measures research design be appropriate?

a.	Comparing mathematical skills for girls versus boys at age10
b.	Comparing pain tolerance with and without acupunctureneedles
c.	Comparing self-esteem for students who participate in schoolathletics versus those who do not
d.	Comparing verbal solving skills for science majors versus artmajors at a college

12. The following data were obtained from a repeated-measuresresearch study. What is the value of SS for the differencescores?

a.	10
b.	6
c.	4
d.	1

Subject #: 1st - 2nd Measures

Subject 1: 10 - 11

Subject 2: 4 - 6

Subject 3: 7 - 9

Subject 4: 6 - 5

13. A repeated-measures experiment and a matched-subjectsexperiment each produce a t statistic with df = 10. How manyindividuals participated in each study?

a.	11 for repeated and 11 for matched
b.	11 for repeated and 12 for matched
c.	11 for repeated and 22 for matched
d.	12 for repeated and 12 for matched

14. A repeated-measures study comparing two treatments withn = 4 participants produces M_D = 2 and SS = 75for the difference scores. What is the estimated standard error forthe sample mean difference?

a.	25
b.	25/4 = 6.25
c.	5
d.	2.5

15. For a repeated-measures study comparing two treatmentconditions, a researcher obtains a sample of n = 9difference scores with a mean of M_D = 4 and a varianceof s² = 36. What is the value for the repeated-measurest statistic for these data?

a.	4/2
b.	4/4
c.	4/6
d.	4/36

16. A researcher obtains t(20) = 2.00 and M_D = 9 fora repeated-measures study. If the researcher measures effect sizeusing the percentage of variance accounted for, what value will beobtained for r²?

a.	9/20
b.	9/29
c.	4/13
d.	4/24

17. A researcher reports t(12) = 2.86, p < .05 for arepeated-measures research study. How many individuals participatedin the study?

a.	n = 11
b.	n = 13
c.	n = 24
d.	n = 25

18. A researcher is using a repeated-measures study to evaluatethe difference between two treatments. If the difference betweenthe treatments is consistent from one participant to another, thenthe data should produce ______.

a.	a small variance for the difference scores and a small standarderror
b.	a small variance for the difference scores and a large standarderror
c.	a large variance for the difference scores and a small standarderror
d.	a large variance for the difference scores and a large standarderror

19. A sample of n = 9 college students is used toevaluate the effectiveness of a new Study Skills Workshop. Eachstudent’s grade point average (GPA) is recorded for the semesterbefore the workshop and for the semester after the workshop. Theaverage GPA improved by M_D = 0.60 points withs² = 0.09. The researcher would like to use the sampleto estimate how much effect the workshop would have for the entirecollege population. Which of the following is the 80% confidenceinterval for these data?

a.	µD = 0.60 + 0.01(1.397)
b.	µD = 0.60 + 0.09(1.860)
c.	µD = 0.60 + 0.10(1.397)
d.	µD = 0.60 + 0.10(1.860)

20. Compared to an independent-measures design, arepeated-measured study is more likely to find a significant effectbecause it reduces the contribution of variance due to ______.

a.	time-related factors
b.	order effects
c.	the effect of the treatment
d.	individual differences