Statistics students believe that the mean score on a first statistics test is 65. The instructor thinks that the mean score is higher. She samples 10 statistics students and obtains the scores: Grades 62.7 63.9 73.5 63.9 65 66.5 88 65 69 96 Test grades are believed to be normally distributed. Use a significance level of 5%. A. State the alternative hypothesis: HA Ou / 65 OH 65 B. State the mean of the sample: Round to two decimal places.) C. State the standard error of the sample means: Round to four decimal places.) D. State the test statistic: t (Round to four decimal places.) se 1 E. State the p-value: (Round to four decimal places.) F. Decision: Do not reject the null hypothesis. O Reject the null hypothesis