Estimator Variance
Jump to navigation
Jump to search
See: Point Estimate, Sample Variance Value, Population Variance, Estimator, Estimator Bias.
References
2009
- http://en.wikipedia.org/wiki/Estimator#Efficiency
- Two naturally desirable properties of estimators are for them to be unbiased and have minimal mean squared error (MSE). These cannot in general both be satisfied simultaneously: a biased estimator may have lower mean squared error (MSE) than any unbiased estimator: despite having bias, the estimator variance may be sufficiently smaller than that of any unbiased estimator, and it may be preferable to use, despite the bias; see estimator bias.