Lean Six Sigma Black Belt (LSSBB) — Question 5

A valid Multiple Linear Regression (MLR) is characterized by all of these except?

Answer options

• A. It is an assumption that the X's (inputs) are not correlated to each other
• B. The X's (inputs) are assumed to be independent of each other
• C. The Residuals from MLR analysis have to be Normally Distributed
• D. MLR is conducted based on a deliberate form of experimentation
• E. It is not possible to evaluate interactions in a MLR analysis

Correct answer: D

Explanation

The correct answer is D because MLR can indeed be conducted based on observational data, not just experimental data. The other options describe valid assumptions or characteristics of MLR, such as independence of inputs and the distribution of residuals.