logit
The inverse of the sigmoid or logistic function used in mathematics, especially in…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
Meaning
2 sensesThe 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
operatorname logit(p)= log (p/(1-p))= log (p)- log (1-p).!,
(informal, metonymically)A logistic regression, which applies such a mathematical function.
Origin
Blend of logistic + unit, by analogy with probit, coined by American statistician Joseph BBlend of logistic + unit, by analogy with probit, coined by American statistician Joseph Berkson in 1944: “I use this term [logit] for ln p/q following Bliss, who called the analogous function which is linear on x for the normal curve ‘probit.’”
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