13. The Department of Health and Welfare in Pulaski County is reviewing charges for a common surgical procedure which was performed in each of three hospitals located within Pulaski County. A random sample of five charges for the surgical procedure from each of the three hospitals is listed in the table to the right. At the .01 level of significance, does there appear to be any difference in the mean charge for this surgical procedure among the three hospitals? a. State the null and alternate hypotheses. Ho: H: b. State the decision rule. c. Compute the value of the test statistic (use the tables). Providence 5580 5975 7544 6067 9080 County Mercy 4700 4500 6300 7600 5540 5800 7000 6000 C. 7600 5590