ASQ Certified Six Sigma Black Belt (CSSBB) — Question 11

A valid mathematical Regression represents all of the characteristics shown except _________________.

Answer options

• A. All of the standardized residuals will be within ±3 Standard Deviations
• B. The sum of the residuals is zero
• C. The residuals when plotted follow a Normal Distribution
• D. Most standardized residuals are within ±2 Standard Deviations
• E. The Residual is equal to the difference between the observed and predicted values

Correct answer:

Explanation

The correct answer is A because while most standardized residuals typically fall within ±2 Standard Deviations, it's not guaranteed that all will fall within ±3. Options B, C, D, and E are characteristics that are generally true for a valid regression model, making them incorrect choices in this context.