A student believes that the average grade across the entire university on the statistics final examination was 87. A sample of 36 final examinations was taken from a current class. The average grade in the sample was 83.96 with a population standard deviation of ? = 12.
State the null and alternative hypotheses to test whether or not the grade average grade in the current class is below the university level.
Compute the test statistic.
c. Using the critical value approach, test the hypotheses at the 1% level of significance.
d. Using the p-value approach, test the hypotheses at the 1% level of significance.
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