logit

== English == === Etymology === Blend of logistic +‎ unit, by analogy with probit, coined by American statistician Joseph Berkson in 1944: “I use this term [logit] for ln ⁡ p / q {\displaystyle \ln p/q} following Bliss, who called the analogous function which is linear on x {\displaystyle x} for the normal curve ‘probit.’” === Pronunciation === (US) IPA(key): /ˈloʊd͡ʒɪt/, /ˈlɑd͡ʒɪt/ (UK) IPA(key): /ˈlɒd͡ʒɪt/ === Noun === logit (plural logits) (mathematics) The inverse of the sigmoid or logistic function used in mathematics, especially in statistics. The logit of a number p between 0 and 1 is given by the formula: logit ⁡ ( p ) = log ⁡ ( p 1 − p ) = log ⁡ ( p ) − log ⁡ ( 1 − p ) . {\displaystyle \operatorname {logit} (p)=\log \left({\frac {p}{1-p}}\right)=\log(p)-\log(1-p).\!\,} (finance, metonymic, informal) A logistic regression, which applies such a mathematical function. ==== Related terms ==== probit === See also === bit === References === == Old Norse == === Participle === logit strong neuter nominative/accusative singular of loginn === Verb === logit supine of ljúga