Business students taking statistics at Colonel Samuel College believe that the mean score on a first statistics test is at most 68. An instructor, intending to prove that the mean score is higher, randomly samples 14 statistics students and obtains the following scores:

73.5 69.2 73.5 72.5 62.7 65 64.3 85.5 83.2 64.3 63.9 74.4 68.4 61.9A. Select the appropriate alternative hypothesis, H1 or Ha : Ou > 68 Ou 68 Ou # 68 OH 68 Ou = 68 B. Calculate the sample mean: C. Calculate the estimated standard error of the sample mean: D. Calculate the test statistic: t = E. State the critical value at a = 0.1: F. Decision: O Fail to reject the null hypothesis. O Reject the null hypothesis