what is the coefficient in a coefficient matrix if the variance is non zero, what is the square of the expected value of the regression line? what is the ___ in a regression what is the difference between the diagonal error and the constant variance in regression? what is the value of e_i$ in the off-diagonal term of the regression graph what is the variance of the regression graph where does coefficient of error for regression what is an off diagonal term the diagonal is the measure of the what is diagonal variance which term means the square of the error of the diagonal? what's the diagonal of error of an excel graph? which term is the constant error variance in a regression analysis? what is the coefficient of error in a regression what is the variance of the regression graph which of the following statements describes a covariance matrix? which error is a constant in a regression graph? what is the covariance in the graph? what is e in graph what is the coefficient of error variance in a regression line?