estimator

A prescription for obtaining an estimate from a random sample of data. An e. is a procedure, not a result, and therefore is a random variable and has a variance. For instance an e. of the mean weight in adult men may consist of the prescription “Add up the weights of 100 men and divide by 100.” The actual outcome (the estimate) will vary from sample to sample, but one answer will not be a random variable.
- least squares e. the prescription “Assign to the unknown parameter the value that minimizes the mean of the squares of the residual errors.”
- maximum likelihood e. the prescription “Assign to the unknown parameter that value that maximizes the likelihood for the sample.” For many problems this procedure is an optimal one.

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es·ti·ma·tor (esґtĭ-ma″tər) estimate1 (def. 2).

Medical dictionary. 2011.

Look at other dictionaries:

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  • Estimator — Es ti*ma tor, n. [L. aestimator.] One who estimates or values; a valuer. Jer. Taylor …   The Collaborative International Dictionary of English

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  • estimator — estimate ► NOUN 1) an approximate calculation. 2) a written statement indicating the likely price that will be charged for specified work. 3) a judgement or appraisal. ► VERB ▪ form an estimate of. DERIVATIVES estimation noun estimator …   English terms dictionary

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