(Data file: salary) Using the salary data in, one fitted mean function is Give the coefficients in the estimated mean function if Sex were coded so males had the value 2 and females had the value 1...

(Data file: salary) Using the salary data in, one fitted mean function is

Give the coefficients in the estimated mean function if Sex were coded so males had the value 2 and females had the value 1 (the coding given to get the above mean function was 0 for males and 1 for females).

Give the estimated coefficients if sex were coded as −1 for males and +1 for females.