Assume that data for a sample of 69 individuals were recorded on systolic blood pressure (Y), age (X), and sex (Z) that includes two categories (Z= 1 if female and Z = 0 if male). The following SAS output is based on the data analysis. Consider that the overall mean of (for the combined data of both males and females) = 46.14. Regressing of Y on X Dependent Variable: y 'SBP' DF Sum of Squares Mean Square F Value Pr > F Source Model 1 14951.25461 14951.25461 121.27 t Dependent Variable: y 'SBP' DF Sum of Squares Mean Square F Value Pr> F Source Model 2 18009.77936 9004.88968 114.25 F Source Model 3 18010.32871 6003.44290 75.02 Consider that Y = 0 1 B + B X + B Z + E 2 c) Calculate a 99% confidence interval for the population difference between the male and female adjusted means. ( )