why do you square residuals in ols why square residuals instead of absolute residuals why square residuals why do we square residuals why do we use square residuals instead of absolute residuals? why use squared residuals in ols estimation why use square residuals why use squared residual value why is square residual used instead of absolute residuals why square residual why square residuals instead of absolute why are squared residuals used why use square residuals why are residuals squared why square residuals why square residuals why do we use square residuals why square residuals what is the squared residual used for in ols why are residuals squared when using absolute