Question

# A statistical program is recommended. A 10-year study conducted by the American Heart Association provided data...

A statistical program is recommended.

A 10-year study conducted by the American Heart Association provided data on how age, blood pressure, and smoking relate to the risk of strokes. Data from a portion of this study follow. Risk is interpreted as the probability (times 100) that a person will have a stroke over the next 10-year period. For the smoker variable, 1 indicates a smoker and 0 indicates a nonsmoker.

Risk Age Blood
Pressure
Smoker
12 57 152 0
24 67 163 0
13 58 155 0
56 86 177 1
28 59 196 0
51 76 189 1
18 56 155 1
31 78 120 0
37 80 135 1
15 78 98 0
22 71 152 0
36 70 173 1
15 67 135 1
48 77 209 1
15 60 199 0
36 82 119 1
8 66 166 0
34 80 125 1
3 62 117 0
37 59 207 1

Using age, blood pressure, and whether a person is a smoker, develop an estimated regression equation that can be used to predict risk. Use x1 for age, x2 for blood pressure, and x3 for whether a person is a smoker. (Round your constant term to one decimal place and coefficients to three decimal places.)

ŷ =

The statistical software output for this problem is:

Hence,

= -91.8 + 1.077x1 + 0.252x2 + 8.740x3

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