A residual plot for a linear regression shows a clear curved pattern. What does this suggest?
Answer and explanation
Correct answer: A. A linear model is not appropriate for these data
- Step 1: Residuals of a good linear model scatter randomly around zero. Step 2. A curve shows that the relationship is not linear. Answer: a linear model is not appropriate. Why not the others: A distinct non-linear curvature in a residual plot indicates that the relationship between variables is fundamentally non-linear, violating linear regression assumptions.
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