A Priori Probability

(redirected from Prior probability)
Also found in: Dictionary, Thesaurus, Medical, Legal, Encyclopedia, Wikipedia.
Related to Prior probability: joint probability, conditional probability, Bayes theorem

A Priori Probability

In statistics, the use of logic to estimate the probability of an event. For example, when considering a company's earnings, the company can make a profit, suffer a loss, or break even in a given year. All other things being equal, there is a 1/3 a priori probability of each scenario occurring.
References in periodicals archive ?
Contrary to Johnson, assessing the prior probability that the database
In the new approach, the prior probability of each state of a node can be determined by the following pair-wise comparison matrix:
Assume a random number M within [0, 1], the node state is normal if M is smaller than the prior probability of the service node.
Perhaps that is because even if an initial prior probability is completely unfounded, it appears that systematic recalculation of the initial probability on new evidence will correct the original misapprehension, which might make it seem that the initial prior makes little or no difference to correct reasoning.
Using logit, the proportion of failed banks in the sample must be the same as the proportion in the population to account for the prior probability of failure.
Critics, however, point to the need for a prior probability P(A 11) in order to use the theorem, and claim that its value is simply a 'subjective' choice.
There are two cases to consider: The first is that B has beliefs about C's portfolio that are sufficiently well formed as to be described by a unique prior probability distribution, which means that for each portfolio that C could hold, B assigns a single probability number to the likelihood that C could hold that portfolio.
Quiet" he said, "So you look on the bedside table first and if it is not there, the bedside table prior probability has to be redistributed among the other locations.
2] in a site map means higher prior probability of transition between these two pages than if there were no link in a site map.
Often this prior probability is more than a mere guess--it could be based, for instance, on previous studies.