## (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:

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Sep 13, 2020

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