1. Suppose that the following data were collected on emphysema patients: The number of years the patient smoked and inhaled (x) and a physician's subjective evaluation of the extent of lung damage (y). The latter variable is measured on a scale of 0 to 100. Measurements taken on 10 patients are as follows:

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1. Suppose that the following data were collected on
emphysema patients: The number of years the patient
smoked and inhaled (x) and a physician's subjective
evaluation of the extent of lung damage (y). The latter
variable is measured on a scale of 0 to 100.
Measurements taken on 10 patients are as follows:
Patient Years smoking, x Lung damage, y
1
25
55
36
60
3
22
50
4
15
30
48
75
6
39
70
7
42
70
31
55
9
28
30
10
33
35
a) Calculate the coefficient of correlation r between years
smoking (x) and lung damage (y).
b) If getting lung damage is dependent on years of
smoking, what is the equation forpredicting extent
of lung damage, if one knows the number of years
one has been smoking?
Transcribed Image Text:1. Suppose that the following data were collected on emphysema patients: The number of years the patient smoked and inhaled (x) and a physician's subjective evaluation of the extent of lung damage (y). The latter variable is measured on a scale of 0 to 100. Measurements taken on 10 patients are as follows: Patient Years smoking, x Lung damage, y 1 25 55 36 60 3 22 50 4 15 30 48 75 6 39 70 7 42 70 31 55 9 28 30 10 33 35 a) Calculate the coefficient of correlation r between years smoking (x) and lung damage (y). b) If getting lung damage is dependent on years of smoking, what is the equation forpredicting extent of lung damage, if one knows the number of years one has been smoking?
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