If E(θˆ)=θ, then θˆ is said to be_______________?
Correct answer: A. Unbiased
- A. Unbiased
- B. Consistent
- C. Sufficient
- D. Efficient
Explanation
An estimator is unbiased when its expected value equals the parameter it estimates, so E(θ̂)=θ is the defining condition. Consistency concerns convergence as the sample size increases, not equality of expectations.
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