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Which of the following statements is/are true concerning residual plots?

I. A residual plot is constructed by plotting the independent variable against the residual on the $y$-axis.
II. A residual plot should have a positive slope if the slope of the least squares regression line is above zero.
III. A residual plot shows how the errors in a linear regression model are arranged.

A

I only.

B

I and II only.

C

I, II, and III.

D

II and III only.

E

I and III only.

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