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EXERCISES 495
10.3.3 In a study of factors thought to be related to patterns of admission to a large general hospital, an
administrator obtained these data on 10 communities in the hospital’s catchment area:
Index of
Persons per 1000 Availability of
Population Admitted Other Health Index of
During Study Period Services Indigency
Community (Y) (X 1 ) (X 2 )
1 61.6 6.0 6.3
2 53.2 4.4 5.5
3 65.5 9.1 3.6
4 64.9 8.1 5.8
5 72.7 9.7 6.8
6 52.2 4.8 7.9
7 50.2 7.6 4.2
8 44.0 4.4 6.0
9 53.8 9.1 2.8
10 53.5 6.7 6.7
Total 571.6 69.9 55.6
10.3.4 The administrator of a general hospital obtained the following data on 20 surgery patients during
a study to determine what factors appear to be related to length of stay:
Postoperative
Preoperative
Length of Number of Current Length of
Stay in Days Medical Problems Stay in Days
(Y) (X 1 ) (X 2 )
6 1 1
6 2 1
11 2 2
9 1 3
16 3 3
16 1 5
4 1 1
8 3 1
11 2 2
13 3 2
13 1 4
9 1 2
17 3 3
17 2 4
12 4 1
6 1 1
5 1 1
(Continued)