After some consideration, the CEO of ABC Enterprises determined that the mean meal expenditure for the population is really about 51 dollars per day. Accountant X in ABC Enterprises has been collecting receipts from the company's travelers, and 51 dollars "felt wrong" to her. She had receipts from 8 employees on her desk. Upon averaging (finding the mean) them, she found that the mean daily expenditure was 56 dollars with a standard deviation of 3 dollars and 50 cents. She set alpha at 0.05.We are going to conduct a hypothesis test to determine if the mean expenditure is different than 51 dollars.

Show how you used z or t to get p.

Is p greater or less than alpha? Why is that important?

Should the null hypothesis be rejected or failed to be rejected? Why?

What is your conclusion? Is the accountant correct?