Karl Pearson - Developer of Pearson Correlation, Negative Correlation - -1, Positive Correlation - 1, kind of categorical data with a set order or scale to it - Ordinal, Weak Correlation - 0, Statistical Package for Social Sciences - SPSS, Summation of X - ∑x, Summation of y - ∑ y, x multiply by y - xy, Summation of xy - ∑xy, Pearson product-moment correlation - Pearson-r correlation, Summation of  x 2 - ∑x 2, Summation of y 2 - ∑y 2, t is a measure of the strength and direction of association - Pearson product-moment correlation, number of pairs - n,

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