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reliability coefficient

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  • reliability coefficient — noun : a measure of the accuracy of a test or measuring instrument obtained by measuring the same individuals twice and computing the correlation of the two sets of measures …   Useful english dictionary

  • Reliability (statistics) — In statistics, reliability is the consistency of a set of measurements or measuring instrument, often used to describe a test. This can either be whether the measurements of the same instrument give or are likely to give the same measurement… …   Wikipedia

  • Coefficient of variation — In probability theory and statistics, the coefficient of variation (CV) is a normalized measure of dispersion of a probability distribution. It is also known as unitized risk or the variation coefficient. The absolute value of the CV is sometimes …   Wikipedia

  • coefficient — 1. The expression of the amount or degree of any quality possessed by a substance, or of the degree of physical or chemical change normally occurring in that substance under stated conditions. 2. The ratio or factor that relates a quantity… …   Medical dictionary

  • reliability — The degree of stability exhibited when a measurement is repeated under identical conditions. See correlation coefficient, r. coefficient. [M.E. relien, fr. O.Fr. relier, fr. L. religo, to bind] equivalent form r. in psychology, the consistency of …   Medical dictionary

  • Inter-rater reliability — In statistics, inter rater reliability, inter rater agreement, or concordance is the degree of agreement among raters. It gives a score of how much homogeneity, or consensus, there is in the ratings given by judges. It is useful in refining the… …   Wikipedia

  • Concordance correlation coefficient — In statistics, the concordance correlation coefficient measures the agreement between two variables, e.g., to evaluate reproducibility or for inter rater reliability. Definition Lawrence Lin has the form of the concordance correlation coefficient …   Wikipedia

  • Probability plot correlation coefficient plot — Many statistical analyses are based on distributional assumptions about the population from which the data have been obtained. However, distributional families can have radically different shapes depending on the value of the shape parameter.… …   Wikipedia

  • Reflection coefficient — The reflection coefficient is used in physics and electrical engineering when wave propagation in a medium containing discontinuities is considered. A reflection coefficient describes either the amplitude or the intensity of a reflected wave… …   Wikipedia

  • 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

  • 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

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