Question 9 I .. . 6 pts A sample mean, sample standard deviation, and sample size are given. Use the one-mean t-test to perform the required hypothesis test about the mean, u, of the population from which the sample was drawn. Use the critical-value approach. Sample mean = 3.18 s = 0.51 n = 9 a = 0.01 H0: p. = 2.85 H12 Ll > 2.85 1. The test statistics is 1 (Round to three decimal places) 2. The critical valuels) is/are :1 (If there are two critical values separate each with a comma.) 3. The decision is to E the null hypothesis. (Enter R if you reject and enter F if you fail to reject)