\\'l Question 5 1 . 6 pts A sample mean, sample standard deviation, and sample size are given. Use the one-mean ttest 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 = 7.1 s = 2.3 n = 18 a = 0.01 H03 [1 = 10 H1: p.