1. A hospital conducted a study of the waiting time in its emergency room. The hospital has a main campus and three satellite locations.

Management had a business objective of reducing waiting time for emergency room cases that did not require immediate attention. To study this, a random sample of 15 emergency room cases that did not require immediate attention at each location were selected on a particular day, and the waiting time (measured from check-in to when the patient was called into the clinic area) was measured. The results are stored in ERWaiting"

a. At the 0.05 level of significance, is there evidence of a difference in the mean waiting times in the four locations?

Attachment:- data1.xlsx