Useful english dictionary. 2012.
Phi coefficient — In statistics, the phi coefficient (also referred to as the mean square contingency coefficient and denoted by φ or rφ) is a measure of association for two binary variables introduced by Karl Pearson[1]. This measure is similar to the Pearson… … Wikipedia
phi correlation — noun an index of the relation between any two sets of scores that can both be represented on ordered binary dimensions (e.g., male female) • Syn: ↑phi coefficient, ↑fourfold point correlation • Topics: ↑statistics • Hypernyms: ↑ … Useful english dictionary
Phi (letter) — Phi (uppercase Φ, lowercase φ or Unicode|ϕ), pronounced [IPA|fī] in modern Greek and as [IPA|faɪ] in English, is the 21st letter of the Greek alphabet. In modern Greek, it represents [IPA|f] , a voiceless labiodental fricative. In Ancient Greek… … Wikipedia
Coefficient de marée — Calcul de marée Le calcul de marée est la méthode utilisée en navigation maritime pour estimer la hauteur d eau, dans un lieu et à un instant donné, en prenant en compte l influence de la marée. Les marées sont le résultat de l attraction de la… … Wikipédia en Français
Matthews correlation coefficient — The Matthews correlation coefficient is used in machine learning as a measure of the quality of binary (two class) classifications. It takes into account true and false positives and negatives and is generally regarded as a balanced measure which … Wikipedia
Activity coefficient — An activity coefficient [ [http://www.iupac.org/goldbook/A00116.pdf Gold Book definition] ] is a factor used in thermodynamics to account for deviations from ideal behaviour in a mixture of chemical substances. In an ideal mixture the… … Wikipedia
Effect size — In statistics, an effect size is a measure of the strength of the relationship between two variables in a statistical population, or a sample based estimate of that quantity. An effect size calculated from data is a descriptive statistic that… … Wikipedia
Contingency table — In statistics, a contingency table (also referred to as cross tabulation or cross tab) is a type of table in a matrix format that displays the (multivariate) frequency distribution of the variables. It is often used to record and analyze the… … Wikipedia
Cramér's V — Cramér s V (φc) In statistics, Cramér s V (sometimes referred to as Cramér s phi and denoted as φc) is a popular[citation needed] measure of association between two nominal variables, giving a value between 0 and +1 (inclusive). It… … Wikipedia
distribution free statistic — noun a statistic computed without knowledge of the form or the parameters of the distribution from which observations are drawn • Syn: ↑nonparametric statistic • Topics: ↑statistics • Hypernyms: ↑statistic • Hyponyms: ↑ … Useful english dictionary
