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This data is taken from Finkelstein and Levin.
The Able Company claimed in TV advertisements that taking its product Super-Drowsy reduced the time to fall asleep by 46% over the time necessary without pills. Able based this claim on a sleep study. Persons were asked to record how long they took to fall asleep (`sleep latency') in minutes, and their average for a week was calculated. In the next week these persons received Super-Drowsy and recorded their sleep latency. The following table gives the average sleep latency for each of the 73 persons first for the week without Super Drowsy and then for the week with Super Drowsy.
The data below is the contents of the disk file sleep.dat.
1 61.07 20.36 26 16.07 7.50 51 41.79 11.79
2 46.07 37.50 27 33.21 26.79 52 22.50 22.50
3 84.64 61.07 28 51.43 20.36 53 39.64 18.21
4 31.07 9.64 29 28.93 18.21 54 78.21 26.79
5 54.64 28.93 30 139.29 37.50 55 46.07 16.07
6 26.79 11.79 31 78.21 39.64 56 46.07 28.93
7 58.93 31.07 32 43.93 35.36 57 61.07 33.21
8 13.93 9.64 33 111.43 7.50 58 39.64 28.93
9 71.79 35.36 34 56.79 31.07 59 56.79 18.21
10 82.50 33.21 35 106.07 43.93 60 43.93 24.64
11 37.50 24.64 36 98.57 77.14 61 43.93 24.64
12 35.36 46.07 37 43.93 70.00 62 31.07 24.64
13 37.50 9.64 38 114.64 26.79 63 46.06 24.64
14 114.64 16.07 39 39.64 33.21 64 22.50 9.64
15 35.36 9.64 40 91.07 31.07 65 50.36 41.79
16 73.93 35.36 41 18.21 20.36 66 41.79 18.21
17 17.50 11.79 42 63.21 18.21 67 35.36 18.21
18 94.29 20.36 43 37.50 20.36 68 65.36 78.21
19 22.50 9.64 44 41.79 22.50 69 37.50 31.50
20 58.93 30.00 45 40.00 43.93 70 48.21 9.64
21 46.07 100.71 46 50.36 41.79 71 102.86 43.93
22 31.07 9.64 47 48.21 60.00 72 86.79 43.93
23 62.14 20.36 48 63.21 50.36 73 31.07 9.64
24 20.36 13.93 49 54.64 20.36
25 56.79 32.14 50 73.93 13.93
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Copyright © 1997 by Jerry Alan Veeh. All rights reserved.