what is d in regression what is the coefficient for a coefficient in regression? can you calculate correlations on regression? what is the matrix for regression with known correlations between the errors? what is the matrix for weighted least squares what is the matrix of the error called? what is the matrix for x and y for linear regression what is a weighted least squares how to do regression with known correlations among the errors? why is $d$ the matrix of error how does the coefficient of regression work when using y_t regression what is the covariance matrix what do you call the covariance matrix of the errors how to do regression with known correlations among the errors what type of equation is weighted least squares what is the function of the coefficient of coefficient of correlation what is the arithmetic of the weighted least sql of the logistic regression how to find correlations between coefficients how to do regression with the known correlations among the errors when do you do regression when you have known correlations among the errors?