why do i get the same results for ols and gls in r what is an lm in r what is the difference between a ols and a gls how to find the residual p value in r what is the r residual value how to calculate residuals with r r what is std standard error in ols? what is the difference between ols and gls in r what is standard residuals for gls what is residual standard error range? r. std error r calculate standard error std error formula in r what is lm in r what is p value of standardised error lm how can i find ols and gls why do i get the same results for ols and gls what is the coefficients in lm what is p value of the standard error in r for ols what is the value of std standard error p value