Question
13. An independent-measures study uses n = 15 participants in each group to compare two treatment conditions. What is the df value for the t-statistic
13. An independent-measures study uses n = 15 participants in each group to compare two treatment conditions. What is the df value for the t-statistic for this study?
a.14
b.15
c.28
d.29
14. An independent-measures research study uses two samples, each with n = 10 participants. If the data produce a t-statistic of t = 2.095, which of the following is the correct decision for a two-tailed hypothesis test?
a.Reject the null hypothesis with = .05 but fail to reject with = .01
b.Reject the null hypothesis with either = .05 or = .01
c.Fail to reject the null hypothesis with either = .05 or = .01
d.Cannot answer without additional information
15. For which of the following situations would a repeated-measures research design be appropriate?
a.Comparing mathematical skills for girls versus boys at age 10
b.Comparing pain tolerance with and without acupuncture needles
c.Comparing self-esteem for students who participate in school athletics versus those who do not
d.Comparing verbal solving skills for science majors versus art majors at a college
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