If a sampling distribution is centred on the true population parameter but has unnecessary spread, which property should be improved?
Correct answer: B. Precision
- A. Unbiasedness
- B. Precision
- C. Representativeness
- D. Randomization
Explanation
An estimator can be unbiased while still having high variance. Reducing its spread improves precision, whereas unbiasedness concerns whether its average value equals the true parameter.
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