(solution) A 10-year study conducted by the American Heart Association

(solution) A 10-year study conducted by the American Heart Association

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.  Assume that the following data are a portion from this study. ……

2. 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. Assume that the following data are a portion from this study. Risk is
interpreted as the probability (times 100) that the patient will have a stroke over the next 10-year period. The
patient is a smoker if Smoker = 1 and not a smoker if Smoker=0.
Risk Age
12
24
13
56 57
67
58
86 Pressure Smoker
152
0
163
1
155
0
177
1 a) Look at the output for the following two regression models that relate the risk of stroke to the person?s age,
blood pressure, and smoking status. Write out the ?best? regression model. Use that model for the
remaining questions.
b) Solve the equation to find the slope coefficient on Blood Pressure for a non-smoker.
c) What is the probability of a stroke over the next 10 years for John Doe, a 68 year-old smoker who has a
blood pressure of 175?
d) Are they any high leverage points that we should be concerned about? Use the portions of the JMP Regression output (below and on next page) to answer the following questions: