A residuals plot is useful because
I.it will help us to see whether our model is appropriate.
II.it might show a pattern in the data that was hard to see in the original scatterplot.
III.it will clearly identify influential points.
A)I and II only
B)I, II, and III
C)II only
D)I only
E)I and III only

Question

Quizplus · Accepted Answer

Residuals plots are useful for diagnosing the fit of a regression model by showing the distribution of the residuals and helping to identify heteroscedasticity or non-linearity, which addresses points I and II. However, while residuals plots can help identify outliers, they do not specifically identify influential points, which are points that have a significant impact on the model's parameters.

A Residuals Plot Is Useful Because