Select the MOST appropriate reason multiple regression coefficients are called *conditional coefficients." The estimated coefficient of one independent variable depends on the other exogenous variables The expected value of the random errors are is not equal to zero The independent variables are always linearly related The estimated coefficient of one independent does not depend on the other exogenous variables In a multiple regression analysis, the Mean Square Regression ("MSR") is: Total sum of squares divided by the number of independent variables Regression sum of squares divided by the number of independent variables Regression sum of squares divided by the degree of freedom Residual sum of squares divided by the number of independent variables We want to do a Sign Test for Median. The hypothesis test is a right tailed test. The number of "+"is 8, and the number of -"is 7. Which is the observed value of X? 6 8 9