Weights of 5 boxes of cookies each of which is labeled as containing 16 ounces. Population of weights is normally distributed:91, 14.2, 14.88, 16.07,...

Weights of 5 boxes of cookies each of which is labeled as containing 16 ounces. Population of weights is normally distributed:

15.91, 14.2, 14.88, 16.07, 14.79. A quality control inspector ants to know whether the mean weight is actually less than 16 ounces. Compute P- value of he test and conclusion at the 0.05 level of significance?