I have the answer to a-d, I need the answers for e-f A 10-year study conducted b
ID: 3229946 • Letter: I
Question
I have the answer to a-d, I need the answers for e-f
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 regression results pertain to data on the following. Risk: the probability that the patient will have a stroke over the next 10-year period Age: age of the person Pressure: blood pressure Family: number of strokes the person's parents have had a. What is the R^2 of the regression model? What does it mean? b. What is the standard error of the regression? What does it mean? c. Explain in the context of this problem what the numbers for the following coefficients mean: Age, Pressure, Family d. Test the overall significance of the regression model at a 5 percent significance level e. Is pressure statistically significant in explaining risk? Test this hypothesis at a 10 percent significance level f. Find a 95 percent confidence interval for age. What does this interval mean. and what parameter does it bracket? g. Estimate the risk of a heart attack for a person who is 70 years old, with a blood pressure of 165, and whose parents have had one stroke. h. Can you see a potential problem with predicting using this regression model?Explanation / Answer
e. Yes pressure is significant:
Excel formula:
f. 95% CI :
Excel formula:
Coefficient SE t-stat p-value Intercept -91.76 15.22 -6.02891 1.75383E-05 <.1 significant Age 1.08 0.17 6.352941 9.58675E-06 <.1 significant Pressure 0.25 0.05 5 0.000130868 <.1 significant Family 8.74 3 2.913333 0.010155933 >.1 insignificant