The Essentials of Biostatistics for Physicians, Nurses, and Clinicians

186 Solutions to Selected Exercises

By groups we have ranks and sum of ranks as follows:

17 — summer 6

18 — spring 7

19 — fall 8

20 — fall 9.5

20 — spring 9.5

21 — summer 11

22 — spring 12

23 — fall 13

25 — summer 14

27 — fall 15

28 — summer 16

32 — fall 17

33 — fall 18

35 — winter 19

36 — winter 20.5

36 — winter 20.5

38 — winter 22

41 — winter 23

43 — winter 24

Group 1 (fall

and winter)

Group 2 (spring

and summer)

8 1

9.5 2

1 3 3

1 5 4

1 7 5

1 8 6

1 9 7

20.5 9.5

20.5 11

2 2 1 2

2 3 1 4

2 4 1 6

Rank sum 209.5 90.5

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