product-moment correlation coefficient
A statistical measure of linear correlation between two variables; used in mathematics and data analysis.
The product-moment correlation coefficient indicates the strength of the linear relationship between two variables.
相関係数 is a broader term for correlation coefficient; 積率相関係数 specifically refers to the Pearson product-moment correlation coefficient.
Compound of 積率 (product moment) + 相関係数 (correlation coefficient). The term is a direct translation of the English statistical term.