An auditor for a government agency was assigned the task ofevaluating reimbursement for office visits to physicians paid byMedicare. The audit was conducted on a sample of 75 reimbursements,with the following results:
- In 12 of the office visits, there was an incorrect amount ofreimbursement.
- The amount of reimbursement was xbar = $93.70, s = $34.55.
- At the 0.05 level of significance, is there evidence that thepopulation mean reimbursement was less than $100?
- At the 0.05 level of significance, is there evidence that theproportion of incorrect reimbursements in the population wasgreater than 0.10?
- Discuss the underlying assumptions of the test used in(a).
- What is your answer to (a) if the sample mean equals $90?
- What is your answer to (b) if 15 office visits had incorrectreimbursements?
