Question: 87. An auditor for a government agency is assigned the s of evaluating reimbursement for office visits to physicians paid by Medicare. The audit was conducted on a sample of 75 of the reimbursements, with the following results:

• In 12 of the office visits, an incorrect amount of reimbursement was provided.

• The amount of reimbursement was X = $93.70, S=$34.55

a. At the 0.05 level of significance, is there evidence that the mean reimbursement was less than $100?

b. At the 0.05 level of significance, is there evidence that the proportion of incorrect reimbursements in the population was greater than 0.10?