Noun correlation has 3 senses
  1. correlation, correlativity - a reciprocal relation between two or more things
    --1 is a kind of reciprocality, reciprocity
    Derived forms: verb correlate1, verb correlate2
  2. correlation coefficient, coefficient of correlation, correlation - a statistic representing how closely two variables co-vary; it can vary from -1 (perfect negative correlation) through 0 (no correlation) to +1 (perfect positive correlation); "what is the correlation between those two variables?"
    --2 is a kind of parametric statistic
    --2 has particulars:
     product-moment correlation coefficient, Pearson product-moment correlation coefficient; multiple correlation coefficient; biserial correlation coefficient, biserial correlation; split-half correlation, chance-half correlation; tetrachoric correlation coefficient, tetrachoric correlation
    Derived forms: verb correlate1, verb correlate2
  3. correlation, correlational statistics - a statistical relation between two or more variables such that systematic changes in the value of one variable are accompanied by systematic changes in the other
    --3 is a kind of statistics
    --3 is a part of correlational analysis
    --3 has particulars:
     curvilinear correlation, nonlinear correlation, skew correlation; partial correlation; positive correlation, direct correlation; negative correlation, indirect correlation; spurious correlation
    Derived forms: verb correlate1, verb correlate2
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