The National Institute of Diabetes and Digestive and Kidney Diseases reports that the average cost of bariatric (weight loss) surgery is less than $22,500. You think this information is incorrect. You...

The National Institute of Diabetes and Digestive and Kidney Diseases reports that the
average cost of bariatric (weight loss) surgery is less than $22,500. You think this information is
incorrect. You randomly select 50 bariatric surgery patients and find that the average cost for
their surgeries is $23,545 with a standard deviation of $3015.

Question: Find the critical value for the rejection region and draw the rejection region with it.
Calculate the test statistic for the hypothesis test. What is your decision?