11.25 The waiting time (in minutes) for emergency room patients with non-life-threatening injuries was measured at four hospitals for all patients who arrived between 6:00 and 6:30 PM on a certain Wednesday. The results are shown below. Research question: Are the mean waiting times the same for emergency patients in these four hospitals? Emergency Room Waiting Time (minutes) Hospital A Hospital B Hospital C Hospital D (5 patients) (4 patients) (7 patients) (6 patients) 10 8 5 0 19 25 11 20 5 17 24 9 26 36 16 5 11 18 10 29 12 15
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