In a residual plot against x that does not suggest we should challenge the assumptions of our regression model, we would expect to see
A)a horizontal band of points centered near zero
B)a widening band of points
C)a band of points having a slope consistent with that of the regression equation
D)a parabolic band of points

Question

Quizplus · Accepted Answer

A horizontal band of points centered near zero indicates that the residuals are evenly distributed around the regression line and there is no systematic deviation from the assumptions of the regression model. A widening band of points, a band of points having a slope consistent with that of the regression equation, or a parabolic band of points all suggest potential violations of the assumptions and may require further investigation or model refinement.

In a Residual Plot Against X That Does Not Suggest