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Statistical significance

statistical significance definition

In statistics, a number that expresses the probability that the result of a given experiment or study could have occurred purely by chance. This number can be a margin of error (“The results of this public opinion poll are accurate to five percent”), or it can indicate a confidence level (“If this experiment were repeated, there is a probability of ninety-five percent that our conclusions would be substantiated”).


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  • Statistical tables

    plural noun 1. tables showing the values of the cumulative distribution functions, probability functions, or probability density functions of certain common distributions for different values of their parameters, and used esp to determine whether or not a particular statistical result exceeds the required significance level See hypothesis testing

  • Statistical-thermodynamics

    noun, Physics, Chemistry. (used with a singular verb) 1. the science that deals with average properties of the molecules, atoms, or elementary particles in random motion in a system of many such particles and relates these properties to the thermodynamic and other macroscopic properties of the system. statistical mechanics noun 1. (functioning as sing) the […]

  • Statistician

    [stat-i-stish-uh n] /ˌstæt ɪˈstɪʃ ən/ noun 1. an expert in or compiler of statistics. statistician /ˌstætɪˈstɪʃən/ noun 1. a person who specializes in or is skilled at statistics 2. a person who compiles statistics

  • Statistics

    noun 1. (used with a singular verb) the science that deals with the collection, classification, analysis, and interpretation of numerical facts or data, and that, by use of mathematical theories of probability, imposes order and regularity on aggregates of more or less disparate elements. 2. (used with a plural verb) the numerical facts or data […]

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