The Gauss-Markov Theorem for Multiple Regression Proves That

question 1

Multiple Choice

The Gauss-Markov theorem for multiple regression proves that

• A)MX is an idempotent matrix.
• B)the OLS estimator is BLUE.
• C)the OLS residuals and predicted values are orthogonal.
• D)the variance-covariance matrix of the OLS estimator is (
• X)-1.

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