noun
prior probability
In Bayesian statistics, the probability of an event before new evidence is taken into account. Contrasts with 事後確率 (posterior probability).
See also: 事後確率
事前確率を設定してから、新しいデータで更新する。
We set a prior probability and then update it with new data.
In Bayes' theorem, the posterior probability is calculated from the prior probability and the likelihood.