A health insurance company selected a random sample of hospitals from each of four categories of hospitals: university related, religious related, community owned, and privately owned. At issue is the hospital charges associated with outpatient gall bladder surgery. The data are in the file called Hospitals.

a. Compute the average charge for each hospital category.

b. Construct a bar chart showing the averages by hospital category.

c. Discuss why a pie chart would not in this case be an appropriate graphical tool.