Estimator
USED IN MATHEMATICAL STATISTICS TO DETERMINE AN ESTIMATED VALUE
Efficiency bound; Restricted estimate; Unrestricted estimate; Asymptotically unbiased; Estimators; Asymptotically normal estimator; Parameter estimate; Universal estimator; Estimated value; Statistical estimate; Estimate (statistics)
In statistics, an estimator is a rule for calculating an estimate of a given quantity based on observed data: thus the rule (the estimator), the quantity of interest (the estimand) and its result (the estimate) are distinguished. For example, the sample mean is a commonly used estimator of the population mean.