SAS Statistical Business Analysis Using SAS 9: Regression and Modeling — Question 21

Which characteristic of Studentized residuals indicate potential outliers?

Answer options

• A. Only studentized residuals greater than negative two
• B. Only studentized residuals less than negative two and greater than two
• C. Only studentized residuals greater than two
• D. Only studentized residuals less than two and greater than negative two

Correct answer: C

Explanation

Studentized residuals greater than two indicate that the corresponding data point is significantly different from the fitted model, suggesting it may be an outlier. The other options either include values that do not indicate outliers or restrict the range of residuals incorrectly.