5 7 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 from a portion of this study. Risk is interpreted as the probability (times 100) that the patient will have a stroke over the next 10-year period. For the smoking variable, define a dummy variable with 1 indicating a smoker and indicating a nonsmoker. 8. Risk Age Pressure Smoker 12 57 151 No 24 67 164 No 13 58 156 No 56 86 176 Yes 28 59 198 No 51 76 189 Yes 15 56 157 Yes 31 78 119 NO 37 80 137 Yes mm $%% : 15 28 96 No 22 71 152 No 36 70 173 Yes 15 67 136 Yes 45 22 209 Yes 15 60 197 No 36 82 120 Yes No 8 66 165 34 80 123 Yes 3 62 118 No 37 59 206 Yes a. Develop an estimated regression equation that relates risk of a stroke to the person's age, blood pressure, and whether the person is a smoker. Please round your answers to three decimal places. Enter negative value os negative number. Risk = -9.159 + 1.082 Age + 0.252 Pressure + 8.854 Smoker b. Is smoking o significant factor in the risk of a stroke? Explain. Use a = 0.05. Compute the t test statistic for the significance of smoking (to 2 decimals). Use t table. 2.91 Smoking is The p-value is between 0.01 and 0.025 What is your conclusion? significant factor c. What is the probability of a stroke over the next 10 years for Art Speen, a 68-year-old smoker who has blood pressure of 175? .34 (to 2 decimals) Which of the following factors will the doctor recommend Act work on? Assume that by corresponds to the person's age, by to blood pressure, by to whether the person is a smoker 62 and