An estimate is A) efficient if it has the smallest variance ...

[javeds]

An estimate is
 
  A) efficient if it has the smallest variance possible.
  B) a nonrandom number.
  C) unbiased if its expected value equals the population value.
  D) another word for estimator.

Question 2

Under imperfect multicollinearity
 
  A) the OLS estimator cannot be computed.
  B) two or more of the regressors are highly correlated.
  C) the OLS estimator is biased even in samples of n > 100.
  D) the error terms are highly, but not perfectly, correlated.

[ynlevi]

Answer to Question 1

Answer: B

Answer to Question 2

Answer: B