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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:
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
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.
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