A. The length of time a person spends waiting in a physician's office for an appointment can be a frustrating experience. The results below are the responses of internists from two multispecialty group practices to the following question:
"When patients arrive for midmorning or midafternoon appointments, how long do they generally have to wait before they are seen by you?" A sample of the responses in minutes is:
Group practice A Group practice B
9 23
20 9
7 17
24 26
13 21
29 10
35 8
5 16
0 14
28 26
1. Compute the mean, and standard deviation of the internists' responses from both kinds of group practices.
2. If you had to make an appointment and wanted some assurance that you would not spend more than 30 minutes waiting in the office, which would you choose? Why? (Assume data is Normally distributed, calculate the P( X < 30) for both cases.)