Weighted least squares estimation is used only when _____.
A) the dependent variable in a regression model is binary
B) the independent variables in a regression model are correlated
C) the error term in a regression model has a constant variance
D) the functional form of the error variances is known
Correct Answer:
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Q1: Which of the following is true?
A)If we
Q3: Which of the following is a difference
Q4: Which of the following is true?
A)In ordinary
Q5: The square root of the quantity
Q6: The general form of the t statistic
Q7: Which of the following is true of
Q8: Consider the following regression model: yi =
Q9: The generalized least square (GLS) is an
Q10: Consider the following regression equation: 
Q11: The heteroskedasticity-robust _ is also called the
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