why is the plot of residuals against the fitted values a horizontal line? why do residuals have horizontal lines which assumption of OLS is true? why is the plot of residuals against the fitted value a horizontal line when the plot of residuals is horizontal what is the result mean why is the plot of residuals against the fitted value a horinzontal line? what is the horizontal line in ols why is the plot of residuals against the fitted values a horinzontal line when the dependent variable is linearly related to the independent variable? p. why do the residuals in an ols plot always go horizontal why is the plot of residuals of an OLS curve horizontal why is the plot of residuals against fitted values horinzontal why is plot of residuals against fit values a horinzontal line when the dependent variable is linearly related to the independent variable why does linear regression plot a horizontal line why is the plot of the residuals against the fitted value a horinzontal line why is the plot of residuals against the fitted value a horizontal line why is residuals a horinzontal line why is the plot of the residuals against the fitted t why is the plot of residuals against the fitted value a horizontal line why is the plot of a residual and a fitted value a horizontal line what does horinzontal mean for mean residuals