Risk	Age	Blood Pressure	Smoker yes=1 no=0
12	57	152	0
24	67	163	0
13	58	155	0
56	86	177	1
28	59	196	0
51	76	189	1
18	56	155	1
31	78	120	0
37	80	135	1
15	78	98	0
22	71	152	0
36	70	173	1
15	67	135	1
48	77	209	1
15	60	199	0
36	82	119	1
8	66	166	0
34	80	125	1
3	62	117	0
37	59	207	1

1) Predicted risk for person who is 55-year-old smoker with an average blood pressure 150 is: a) 18.62 b) 44.55 c) 13.97 d) 65.77

2) F test is significant: a) True b) False

3) The adjusted R² value is: a) 0.87 b) 0.93 c) 0.84 d) 0.57

4) Predicted risk for a person who is 65-year old nonsmoker with an average blood pressure 175 is: a) 22.29 b) 34.35 c) 12.91 d) 65.77

5) The regression model is: a) Predicted risk = 91.75 + 1.07age + 0.25blood pressure + 8.73smoker b) Predicted risk = 15.22 + 0.16age +0.04blood pressure + 3.00smoker c) Predicted risk = -6.02 + 6.48age +5.56blood pressure + 2.91smoker d) None of the above

6) Which of the following statements is incorrect for F-test regression results? a) From the F-test results, one can say if all the independent variables are significant b) From the F-test results, one can say if at least one independent variable is significant c) From the F-test results, one can say if the regression model is overall significant d) Whether the estimated probability of type I error is less than 0.05

7) Which of the following statements is correct: a) All the independent variables are significant at alpha = 0.01 b) Only two independent variables are significant at alpha = 0.01 c) Only one independent variable is significant at alpha = 0.01 d) None of the above

8) Residual plots indicate that: a) there is no violation of homoscedasticity assumption b) there is no violation of collinearity assumption c) there is no violation of normality assumption d)None of the above

9) The regression model explains about: a) 15% of the variability of the risk b) 85% of variability of blood pressure c) 15% of variability of age d) none of the above

10) Normality plot indicates that: a) there is no violation of homoscedasticity assumption b) there is no violation of collinearity assumption c) there is no violation of normality assumption d) None of the above