Question: FIRST Statistics students believe that the mean score on a first statistics test is 65. The instructor thinks that the e mean score is higher.

FIRST Statistics students believe that the mean score on a first statistics test is 65. The instructor thinks that the e mean score is higher. She samples 10 statistics students and obtains the scores: ouncements Grades 73.5 74.4 73.5 63.9 68.4 64.3 65 88 88 74.4 gnments Test grades are believed to be normally distributed. ussions Use a significance level of 5%. des A. State the alternative hypothesis: HA : ple Ou 65 Op / 65 labus B. State the mean of the sample: odules C. State the standard error of the sample means: bogle Drive D. State the test statistic: t = ffice 365

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