Neyman–Pearson lemma

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What Wikipedia says

In statistics, the Neyman–Pearson lemma describes the existence and uniqueness of the likelihood ratio as a uniformly most powerful test in certain contexts. It was introduced by Jerzy Neyman and Egon Pearson in a paper in 1933.

Excerpt from the Wikipedia article “Neyman–Pearson lemma”, under the CC BY-SA 4.0 license. Read the article on Wikipedia