Question

A study of the effects of smoking on sleep patterns is conducted. The measure observed is the time, in minutes, that it takes to fall asleep. These data are obtained:

col1 Smokers: 69.3 56.0 22.1 47.6 53.2 48.1 52.7 34.4 60.2 43.8 23.2 13.8
col2 Nonsmokers: 28.6 25.1 26.4 34.9 29.8 28.4 38.5 30.2 30.6 31.8 41.6 21.1 36.0 37.9 13.9

(a) Find the sample mean for each group.
(b) Find the sample standard deviation for each group.
(c) Make a dot plot of the data sets A and B on the same line.
(d) Comment on what kind of impact smoking appears to have on the time required to fall asleep.

Answer 1

Explanation:

Given that a study of the effects of smoking on sleep patterns is conducted. The measure observed is the time, in minutes, that it takes to fall asleep. These data are obtained:

col1 Smokers: 69.3 56.0 22.1 47.6 53.2 48.1 52.7 34.4 60.2 43.8 23.2 13.8

col2 Nonsmokers: 28.6 25.1 26.4 34.9 29.8 28.4 38.5 30.2 30.6 31.8 41.6 21.1 36.0 37.9 13.9

a) refer the file enclosed for dot plot

Smoker non smoker

69.3 28.6

56 25.1

22.1 26.4

47.6 34.9

53.2 29.8

48.1 28.4

52.7 38.5

34.4 30.2

60.2 30.6

43.8 31.8

23.2 41.6

13.8 21.1

36

37.9

13.9

Mean 43.7 30.32

Std dev 16.92776095 7.12783277

d) The non smokers take less time to fall asleep