Name: ________________________ ID: A28. A sample of n = 25 scores produces a t statistic of t = –2.06. If the researcher is using a two-tailed test with α.05, the correct statistical decision is __________.=
9. A research study uses a single sample of participants to evaluate the effect of a treatment. The results of the hypothesis test are reported as follows: “t(14) = 2.73, p < .05.” Based on this report, how many individuals were in the sample?
10. Even a very small treatment effect can be statistically significant if __________.
11. Which of the following research situations is most likely to use an independent-measures design?a.Evaluate the effectiveness of a diet program by measuring how much weight is lost during 4 weeks of dieting.b.Evaluate the effectiveness of a cholesterol medication by comparing cholesterol levels before and after the medication.c.Evaluate the difference in verbal skills between 3-year-old girls and 3-year-old boys.d.Evaluate the development of verbal skills between age 2 and age 3 for a sample of girls.
12. What is the pooled variance for the following two samples?Sample 1: n = 6 and SS = 200.Sample 2: n = 10 and SS = 300