Question: A Statistics Instructor stated that the mean score on the first test was a 72.8.A student does not believe the instructor. The student sampled 15other

A Statistics Instructor stated that the mean score on the first test was a 72.8.A student does not believe the instructor. The student sampled 15other students and found a mean of 78.6and a standard deviation of 9.2. At a level of significance of 5%,do you have enough evidence to reject the claim? Assume the population is normally distributed.

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