As nouns,
product-moment correlation coefficient is a hyponym of
correlation coefficient; that is,
product-moment correlation coefficient is a
word with a more specific, narrower meaning than
correlation coefficient:
- correlation coefficient: 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)
- product-moment correlation coefficient: the most commonly used method of computing a correlation coefficient between variables that are linearly related