a correlation coefficient in which one variable is many-valued and the other is dichotomous

a reciprocal relation between two or more things

a constant number that serves as a measure of some property or characteristic

- transmission
- reflectance
- coefficient of expansion
- coefficient of mutual induction
- constant
- reflectivity
- absorption coefficient
- drag coefficient
- absolute viscosity
- modulus
- coefficient of self induction
- self-inductance
- absorptance
- expansivity
- mutual inductance
- reflection factor
- coefficient of absorption
- weight
- coefficient of viscosity
- coefficient of friction
- coefficient of drag
- dynamic viscosity
- transmittance
- weighting
- coefficient of reflection

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)

- Pearson product-moment correlation coefficient
- multiple correlation coefficient
- tetrachoric correlation coefficient
- biserial correlation
- product-moment correlation coefficient
- split-half correlation
- chance-half correlation
- correlation coefficient
- parametric statistic
- biserial correlation coefficient
- tetrachoric correlation
- coefficient of correlation

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