Business students taking statistics at Colonel Samuel College believe that the mean score on a first statistics test is at most 72. An instructor, intending to prove that the mean score is higher, randomly samples 14 statistics students and obtains the following scores: 62.7 69.2 72.5 70.5 96 75.6 96 66.5 61.9 62.7 83.2 69.2 85.5 69.2 Download CSV Test grades are believed to be normally distributed. Use a significance level of 9%, and round your answers to four decimal places. A. Select the appropriate alternative hypothesis, H:72 Ha 72 Ha=72 OHH72 B. Calculate the sample mean: C. Calculate the standard error of the sample mean: D. Calculate the test statistic: t= E. State the critical value: F. Decision: O Fail to reject the null hypothesis. O Reject the null hypothesis.