APFIVE Conditions for Regression Slope Inference
A researcher wants to calculate a confidence interval for the slope of a regression model predicting annual income (in thousands of dollars) from years of education. Which of the following conditions is NOT required for constructing a valid confidence interval for the slope?
A
The residuals should be approximately normally distributed
B
The relationship between the variables must be exactly linear
C
The standard deviation of residuals should be constant
D
The observations must be independent
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