For a multiple regression model predicting life expectancy, smokers and non-smokers are considered as two distinct categories. The non-smokers were coded as “1” in a dummy variable (x_5x5​). The regression equation is :

For a multiple regression model predicting life expectancy, smokers and non-smokers are considered as two distinct categories. The non-smokers were coded as “1” in a dummy variable (x_5x5​). The regression equation is :

Y = 23.41 + 9.1x_1 + 2.89x_2 + 32.92x_3 + 12.25x_4 + 6.18x_5Y=23.41+9.1x1​+2.89x2​+32.92x3​+12.25x4​+6.18x5​

How many years of life is reduced from a person’s predicted life due to smoking?