The **empirical probability**, also known as **relative frequency**, or **experimental probability**, is the ratio of the number of outcomes in which a specified event occurs to the total number of trials, not in a theoretical sample space but in an actual experiment. In a more general sense, empirical probability estimates probabilities from experience and observation.

In statistical terms, the empirical probability is an *estimate* or estimator of a probability. In simple cases, where the result of a trial only determines whether or not the specified event has occurred, modelling using a binomial distribution might be appropriate and then the empirical estimate is the maximum likelihood estimate. It is the Bayesian estimate for the same case if certain assumptions are made for the prior distribution of the probability. If a trial yields more information, the empirical probability can be improved on by adopting further assumptions in the form of a statistical model: if such a model is fitted, it can be used to derive an estimate of the probability of the specified event.

Read more about Empirical Probability: Mixed Nomenclature

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**Empirical Probability**- Mixed Nomenclature

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**probability**is also used as an alternative to

**empirical probability**or relative frequency ... is not directly related to Bayesian inference, where a-posteriori

**probability**is occasionally used to refer to posterior

**probability**, which is different ... The term a-posteriori

**probability**, in its meaning as equivalent to

**empirical probability**, may be used in conjunction with a priori

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### Famous quotes containing the words probability and/or empirical:

“Crushed to earth and rising again is an author’s gymnastic. Once he fails to struggle to his feet and grab his pen, he will contemplate a fact he should never permit himself to face: that in all *probability* books have been written, are being written, will be written, better than anything he has done, is doing, or will do.”

—Fannie Hurst (1889–1968)

“To develop an empiricist account of science is to depict it as involving a search for truth only about the *empirical* world, about what is actual and observable.... It must involve throughout a resolute rejection of the demand for an explanation of the regularities in the observable course of nature, by means of truths concerning a reality beyond what is actual and observable, as a demand which plays no role in the scientific enterprise.”

—Bas Van Fraassen (b. 1941)