An auditor is tasked with evaluating the reimbursement for office visits to physicians paid by Medicare. The audit was conducted on a sample of 80 reimbursements where the average amount paid was $281.70 with a sample standard deviation of $59.55. At the 0.05 level of significance, is there evidence that the population mean reimbursement was different than $300.00? using critical value or p-value and t-stat or z-stat and Reject or DNR