Question

tell what each of (a) the residual plots indicates about the appropriateness of the linear model that was fit to the data. (b) choose the best answer for residuals plot (b). a single point a. the scattered residuals plot indicates an appropriate linear model. b. the curved pattern in the residuals plot indicates that the linear model is not appropriate. the relationship is not linear. c. the fanned - pattern indicates that the linear model is not appropriate. the models predicting power decreases as the values of the explanatory variable increases.

Explanation:

A residual plot is used to assess the appropriateness of a linear - model. If the residual plot shows a curved pattern, it indicates that the relationship between the variables is not linear and a linear model is not appropriate. A scattered pattern of residuals suggests that a linear model is appropriate.

Answer:

A. The scattered residuals plot indicates an appropriate linear model.
B. The curved pattern in the residuals plot indicates that the linear model is not appropriate. The relationship is not linear.
C. The fanned - out pattern indicates that the linear model is not appropriate. The model's predicting power decreases as the values of the explanatory variable increases.