1. A hypothesis test with a sample of n = 25 participants produces a t statistic of t = +2.53. Assuming a one-tailed test with the critical region in the right-hand tail, what is the correct decision? a. The researcher can reject the null hypothesis with = .05 but not with = .01. b. The researcher can reject the null hypothesis with either =.05 or = .01. c. The researcher must fail to reject the null hypothesis with either = .05 or = .01. d. It is impossible to make a decision about H0 without more information. 2. Assuming a two-tailed one sample test is being used, what are the critical values for t given the following sample sizes: a) N = 10 b) N = 15 c) N = 30 3. Although you can compute a z-score for a single score (a sample of n = 1), it is impossible to compute a t statistic for a sample that has only one score. Explain why. 4. A sample is selected from a population with = 50. After a treatment is administered to the individuals in the sample, the mean is found to be M = 55 and the variance is s2 = 64. a) If the sample has n = 4 scores, then conduct a hypothesis test to evaluate the significance of the treatment effect. Use a two-tailed test with = .05. b) If the sample has n = 16 scores, then conduct a hypothesis test to evaluate the significance of the treatment effect. Use a two-tailed test with = .05. c) Describe how increasing the size of the sample affects the likeliho