Refer to Exercise 11.6. Which pairs of mean examination times differ significantly (4 physicians)?
Exercise 11.6
One particular morning, the length of time spent in the examination rooms is recorded for each patient seen by each physician at an orthopedic clinic. Do the data show a significant Physicians difference in mean times?

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Time in Examination Rooms (minutes) Physician 1 Physician 2 Physician 3 17 30 30 26 32 28 26 29 Physician 4 28 25 27 31 26 34 21 35 31 31 31 27 32 40