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1. a rough calculation or one based on incomplete data.
2. a statistic used to characterize the value of a population parameter. Called also estimator.
3. (es´tĭ-māt) to produce or use such a calculation or statistic.


A prescription for obtaining an estimate from a random sample of data. An estimator is a procedure, not a result, and therefore is a random variable and has a variance. For instance, an estimator 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.


/es·ti·ma·tor/ (es´tĭ-ma″ter) estimate (2).


A prescription for obtaining an estimate from a random sample of data.

Patient discussion about estimator

Q. Hi friends, I like to estimate my body fat based on my height and weight. Hi friends, I like to estimate my body fat based on my height and weight. When I enquired about this I heard about BMI. Though I understood little about it I want to know more about what is BMI and why is it useful?

A. the BMI is not a very good only helps if you are an average person. you can gain weight if you start training and still get in shape and loose fat. but it is our only cheap method...there are gyms that hold a way of measuring body fat- maybe try going to one of those?

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References in periodicals archive ?
Because of the small number of days observed in each area, I also used the basic F:S ratio estimator with the Hartley-Ross correction for biases caused by small sample size (Cochran, 1977):
The OLS estimator for [beta]1 is [sigma]xiYi/[sigma][[xi].
Using all this information, the estimator then calculates the standard labor hours necessary to produce a predetermined number of units.
1989) employed the kernel smoothing method to obtain a hazard-rate function estimator based on a modified form of the Kaplan-Meier estimator.
It also instills a sense of community among all the attendees," commented Marie, Product Specialist for Global IP Estimator, Quantify IP.
The major software used in state estimators is utility state estimation software and power control center software.
myHealthcare Cost Estimator free to all consumers, employers and UnitedHealthcare plan participants through the Health4Me mobile app enabled people to more frequently select high-quality health care providers across all specialties, including primary care physicians (7 percent more likely) and orthopedists (9 percent more likely).
Muntner presented a new analysis in which the ASCVD risk estimator was applied to patients in REGARDS (Reasons for Geographic and Racial Differences in Stroke), a prospective, observational, population-based study of more than 30,000 U.
As a cost estimator, the financial stakes involved only emphasize the need for proper stewardship.
In this study, we performed a simulation experiment, which eliminates potential risk confounding, that tests the accuracy of five alternative outcome estimators: Observed-over-Expected, the Dimick-Staiger estimator, the Hierarchical Poisson (HP) estimator, the Risk-Standardized Mortality Rate (RSMR), and the Moving Average (MA) estimator.
Comprehensive, informed and informative, "Standard Estimating Practice" is effectively organized into four major sections: Practice Common to All Disciplines; Practice Common to Specific Disciplines, Professional Estimating Service Samples; Ethics; Reference Sources; and ASPE Professional Estimator Certification.
The net result of all these studies has been to show that there exist no clear guidelines for the choice of an estimator for econometric models.