probit

probit
prob·it 'präb-ət n a unit of measurement of statistical probability based on deviations from the mean of a normal distribution

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pro·bit (proґbit) [contraction of “probability unit”] a normal variate having mean 5 and standard deviation 1. In quantal biologic assays, the observed responses are often converted to probits (the fraction responding is converted to the probit that cuts off the same fraction of the area under the normal frequency curve) in order to fit a linear log dose–response curve, a procedure based on the assumption that the response thresholds are normally distributed.

Medical dictionary. 2011.

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  • probit — [pʀɔbit] n. m. ÉTYM. 1934; empr. à l angl., abrév. de probability unit. ❖ ♦ Statist. Unité de mesure de la probabilité d une variation normalement distribuée, calculée sur la base d une formule mathématique faisant appel à la variable aléatoire …   Encyclopédie Universelle

  • Probit — In probability theory and statistics, the probit function is the inverse cumulative distribution function (CDF), or quantile function associated with the standard normal distribution. It has applications in exploratory statistical graphics and… …   Wikipedia

  • Probit — La fonction Probit est définie comme l inverse de la fonction de répartition associée à la Distribution Normale. Elle a des applications dans les graphiques statistiques exploratoires (Droite de Henry). Algorithme Notes (en) Cet article est… …   Wikipédia en Français

  • Probit model — In statistics, a probit model is a popular specification of a generalized linear model, using the probit link function. A probit regression is the application of this model to a given dataset. Probit models were introduced by Chester Ittner Bliss …   Wikipedia

  • probit — noun Etymology: probability unit Date: 1934 a unit of measurement of statistical probability based on deviations from the mean of a normal distribution …   New Collegiate Dictionary

  • probit — /prob it/, n. Statistics. a normal equivalent deviate increased by five. [1930 35; PROB(ABILITY) + (UN)IT] * * * …   Universalium

  • probit — noun A unit, derived from a standard distribution, used in measuring the responses to doses …   Wiktionary

  • probit — unit of measurement of statistical probability Units of Measurement …   Phrontistery dictionary

  • probit — n. unit of measurement for statistical probability which is based on deviations from the normal distribution …   English contemporary dictionary

  • probit — [ prɒbɪt] noun Statistics a unit of probability based on deviation from the mean of a standard distribution. Origin 1930s: from prob(ability un)it …   English new terms dictionary

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