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

A valid Multiple Linear Regression (MLR) is characterized by all of these except _______________________.
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. MLR is conducted based on a deliberate form of experimentation
D. The Residuals from MLR analysis have to be Normally Distributed

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Answer: C