Question: True or false 10. In a linear regression, B, = 0 if and only if X, and Y, are uncorrelated within the sample. 11. If

True or false

True or false 10. In a linear regression, B, = 0 if

10. In a linear regression, B, = 0 if and only if X, and Y, are uncorrelated within the sample. 11. If A is a square matrix then A + A' is symmetric. 12. If A and B are symmetric then so is the product AB

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