does a residual plot look bad what makes the plot look bad why does residual plot look bad why do residual plots look bad residual plot is bad why the residual on a plot looks bad what kind of plot is a residual plot what makes residual plotting bad does a residual plot look bad? why do residual plots look bad why do residual plots look bad does residual plot look bad what is the plot for residual why does residual plot look bad what residual plot looks bad why does my residual plot look bad does a residual plot look bad what makes a residual plot good why do residual plots come out so badly why does residual plot look bad