10. Which of the following research situations would be mostlikely to use an independent-measures design? – 2pts

a. Examine the development of vocabulary as a group of childrenmature from age 2 to age 3

b. Examine the long-term effectiveness of a stop-smokingtreatment by interviewing subjects 2 months and 6 months after thetreatment ends

c. Compare the mathematics skills for 9th -grade boys versus 9th-grade girls

d. Compare the blood-pressure readings before medication andafter medication for a group a patients with high bloodpressure

11. An independent-measures study comparing two treatmentconditions produces a t statistic with df = 18. If the two samplesare the same size, how many participants were in each of thesamples? – 2pts.

a. 9

b. 10

c. 19

d. 20

12. For which of the following situations would arepeated-measures research design be appropriate? – 2pts

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

13. A researcher plans to conduct a research study comparing twotreatment conditions with a total of 20 participants. Which of thefollowing designs would produce 20 scores in each treatment? –2pts

a. An independent-measures design

b. A repeated-measures design

c. A matched-subjects design

d. All of the other options would produce 20 scores in eachtreatment.

14. A repeated-measures study uses a total of n = 10participants to compare two treatment conditions. How many scoresare measured in this study, and how many scores are actually usedto compute the sample mean and the sample variance? – 2pts

a. 20 measured and 10 used b. 20 measured and 20 used c. 10measured and 10 used d. 10 measured and 20 used