Which one of the following statement about linear multiple regression is correct? O a. None of the suggested answers are correct. O b. In a multiple regression analysis involving 50 observations and 5 independent variables, the total variation in y is 475 and SSE = 71.25. Then, the coefficient of determination is 0.85. O c. A multiple regression equation has a coefficient of determination of 0.81. Then, the percentage of the variation in y that is explained by the regression equation is 90%. O d. To test the significance of a multiple regression model involving 4 independent variables and 25 observations, the numerator and denominator degrees of freedom for the critical value of F are 3 and 21, respectively. O e. In testing the significance of a multiple regression model with three independent variables, the null hypothesis is Ho: B1 = 32 = B3