Q#43

Imagine that the regression equation for the above data were Y' = 78 + .50X (which it is not), and that the standard error of estimate is 5 (which it also is not). Assuming normality of points around the regression line, between what two values would we expect the life expectancy of approximately 96% of individuals who smoke 4 cigarettes per day to be? (Use your knowledge of the normal curve to approximate this; you don't need a table.)

• A.

(75, 85)

• B.

(70, 80)

• C.

(70, 90)

• D.

(73, 78)