Ms. DuGood is chairing a local fund-raising campaign for Helps-a-Lot charity. Literature from the charity’s national headquarters indicates that the average local contribution is $27.32. Under Ms. DuGood’s leadership, 632 donors contribute an average of $28.19 to the local campaign. The standard deviation (using n − 1) for her donors is $7.82.

a. What additional information would you need to conduct a normal deviate Z test?

b. State the directional hypothesis.

c. Determine the critical t for α = .01.

d. Calculate t using the sample standard deviation as the estimated population standard deviation. Show your calculations.

e. Did the local campaign that Ms. DuGood chaired raise significantly more money than the nationwide average?