A formula used to generate an estimate for an unknown parameter of the probability density of the values of some population, based on the values of a sample from that population. For example, the average of a sample is an estimator for the mean of the population from which the sample was taken.
Es"ti*ma`tor (?), n. [L. aestimator.]
One who estimates or values; a valuer.
© Webster 1913.
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