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 96 66.5 68.4 66.5 66.5 73.5 83.2 73.5 83.2 64.3 Test grades are believed to be normally distributed. Use a significance level of 5%. A. State the alternative hypothesis: HA : OH 65 ON # 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.) E. State the p-value: Round to four decimal places.) F. Decision: O Do not reject the null hypothesis. O Reject the null hypothesis