According to a study conducted on national donut sales the p

According to a study conducted on national donut sales, the population mean number of donuts sold between 6 to 9 a.m. is 41.67 with a population standard deviation of 17.35 donuts. The owner of a local bakery thinks the mean number of donuts sold is more than that. The baker does a simple sample of sales over 31 days and finds the sample mean to be 50.82 donuts. Using a level of significance of 0.05, test the claim that the average number of donuts sold between 6 to 9 a.m. is greater than 41.67.

a. Determine which test statistic you will use: the standard normal distribution, or the student

Solution

a. Determine which test statistic you will use: the standard normal distribution, or the student