1 If, on average, a person smokes 10 cigarettes a day, on average how many days would you expect that person to be absent from work? 2. What is the correlation coefficient between the number of cigarettes and the number of days absent from work? 3.What percentage of variation in number of days absent from work is explained by the number of cigarettes each smoker smokes? 4,What is the standard deviation of prediction errors for this model?

SUMMARY OUTPUT Regression Statistics Multiple R 0.613066977 R Square 0.375851118 Adjusted R Square 0.369482252 Standard Error 3.423363007 Observations 100 ANOVA of MS F gnificance F Regression 1 691.6074008 691.6074 59.01382 1.2E-11 Residual 98 1148.502599 11.71941 Total 99 1840.11 Coefficients Standard Error t Stat P-value Lower 95%Upper 95%ower 95.09 pper 95.0% Intercept 1.640139082 1.306994686 1.254893 0.212502 -0.95355 4.233827 -0.95355 4.233827 Cigrattes 0.256889208 0.03344021 7.682045 1.2E-11 0.190528 0.32325 0.190528 0.32325