In simple linear regression, the plot of residuals versus fitted values should:
A) be free of any patterns.
B) appear to be a random scatter of points about 0 on the vertical axis.
C) have approximately the same spread for all fitted values.
D) All of the above.

Question

Quizplus · Accepted Answer

The residuals versus fitted values plot should be free of any patterns (A), appear to have a random scatter of points about 0 on the vertical axis (B), and have approximately the same spread for all fitted values (C). This ensures that the linear regression model is appropriate and that there is no bias or non-linearity in the relationship between the independent and dependent variables.

In Simple Linear Regression, the Plot of Residuals Versus Fitted