A recent 10-year study conducted by a research team at the Great Falls Medical School was conducted to assess how age, systolic 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 0 indicating a nonsmoker. a) Develop an estimated multiple regression equation that relates risk of a stroke to a persons age, systolic blood pressure, and whether the person is a smoker. What is the estimated regression model? b) Is smoking a significant factor in the risk of a stroke? Use a 0.05 level of significance. c) Is age a significant factor in the risk of a stroke? Use a 0.05 level of significance. d) Is systolic blood pressure a significant factor in the risk of a stroke? Use a 0.05 level of significance. e) What is the probability (risk) of a stroke over the next 10 years for Art Speen, a 68-year-old smoker with a systolic blood pressure of 175? f) What is the value of the multiple coefficients of determination? Interpret it. g) What is the value of the multiple correlation coefficient? Interpret it. h) Write down a 95% confidence interval for 1. Interpret it. i) Write down the 99% confidence inter for 2 and 3. What is your conclusion based on the confidence intervals?