Questions: Is your model appropriate, and if not, why not? Appropriate Not appropriate, fails constant variance assumption Not appropriate, fails mean of zero assumption

Is your model appropriate, and if not, why not?

Appropriate
Not appropriate, fails constant variance assumption
Not appropriate, fails mean of zero assumption

Transcript text: Is your model appropriate, and if not, why not? Appropriate Not appropriate, fails constant variance assumption Not appropriate, fails mean of zero assumption

Solution

Solution Steps

Step 1: Examine the residual plot

The residual plot shows the residuals on the vertical axis and the independent variable (x) on the horizontal axis. We are looking for any patterns or trends in the residuals. Ideally, the residuals should be randomly scattered around zero.

Step 2: Check for constant variance

The spread of the residuals should be roughly constant across all values of x. In this plot, the spread appears relatively consistent across the range of x values. There isn't a noticeable fanning out or funneling in of the residuals.

Step 3: Check for a mean of zero

Visually, the residuals appear to be centered around zero across the range of x values.