absorption coefficient

noun a measure of the rate of decrease in the intensity of electromagnetic radiation (as light) as it passes through a given substance; the fraction of incident radiant energy absorbed per unit mass or thickness of an absorber
absorption coefficient; absorptance.
 absorptance equals 1 minus transmittance
WordNet
Arbitrary coefficient
 (Math.), a literal coefficient placed arbitrarily in an algebraic, expression, the value of the coefficient being afterwards determined by the conditions of the problem.
Webster 1913
biserial correlation coefficient

noun a correlation coefficient in which one variable is manyvalued and the other is dichotomous
biserial correlation.
WordNet
coefficient of absorption

noun a measure of the rate of decrease in the intensity of electromagnetic radiation (as light) as it passes through a given substance; the fraction of incident radiant energy absorbed per unit mass or thickness of an absorber
absorption coefficient; absorptance.
 absorptance equals 1 minus transmittance
WordNet
coefficient of concordance

noun a coefficient of agreement (concordance) between different sets of rank orderings of the same set of things
WordNet
coefficient of correlation

noun a statistic representing how closely two variables covary; it can vary from 1 (perfect negative correlation) through 0 (no correlation) to +1 (perfect positive correlation)
coefficient of correlation; correlation.
 what is the correlation between those two variables?
WordNet
coefficient of drag

noun the ratio of the drag on a body moving through air to the product of the velocity and the surface area of the body
coefficient of drag.
WordNet
coefficient of elasticity

noun (physics) the ratio of the applied stress to the change in shape of an elastic body
elastic modulus; modulus of elasticity.
WordNet
coefficient of expansion

noun the fractional change in length or area or volume per unit change in temperature at a given constant pressure
expansivity.
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coefficient of friction

noun the ratio of the weight of an object being moved along a surface and the force that maintains contact between the object and the surface
WordNet
coefficient of mutual induction

noun a measure of the induction between two circuits; the ratio of the electromotive force in a circuit to the corresponding change of current in a neighboring circuit; usually measured in henries
mutual inductance.
WordNet
coefficient of reflection

noun the fraction of radiant energy that is reflected from a surface
reflectance; reflection factor; reflectivity.
WordNet
coefficient of self induction

noun the ratio of the electromotive force produced in a circuit by selfinduction to the rate of change of current producing it, expressed in henries
selfinductance.
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coefficient of viscosity

noun a measure of the resistance to flow of a fluid under an applied force
dynamic viscosity; absolute viscosity.
WordNet
correlation coefficient

noun a statistic representing how closely two variables covary; it can vary from 1 (perfect negative correlation) through 0 (no correlation) to +1 (perfect positive correlation)
coefficient of correlation; correlation.
 what is the correlation between those two variables?
WordNet
Differential coefficient

noun the result of mathematical differentiation; the instantaneous change of one quantity relative to another; df(x)/dx
derivative; derived function; differential; first derivative.
WordNet
 the limit of the ratio of the increment of a function of a variable to the increment of the variable itself, when these increments are made indefinitely small.
Webster 1913
drag coefficient

noun the ratio of the drag on a body moving through air to the product of the velocity and the surface area of the body
coefficient of drag.
WordNet
Indeterminate coefficients
 (Math.), coefficients arbitrarily assumed for convenience of calculation, or to facilitate some artifice of analysis. Their values are subsequently determined.
Webster 1913
multiple correlation coefficient

noun an estimate of the combined influence of two or more variables on the observed (dependent) variable
WordNet
Partial differentials, Partial differential coefficients, Partial differentiation
 etc. (of a function of two or more variables), the differentials, differential coefficients, differentiation etc., of the function, upon the hypothesis that some of the variables are for the time constant.
Webster 1913
pearson productmoment correlation coefficient

noun the most commonly used method of computing a correlation coefficient between variables that are linearly related
Pearson productmoment correlation coefficient.
WordNet
phi coefficient

noun an index of the relation between any two sets of scores that can both be represented on ordered binary dimensions (e.g., malefemale)
fourfold point correlation; phi correlation.
WordNet
productmoment correlation coefficient

noun the most commonly used method of computing a correlation coefficient between variables that are linearly related
Pearson productmoment correlation coefficient.
WordNet
rankdifference correlation coefficient

noun the most commonly used method of computing a correlation coefficient between the ranks of scores on two variables
rankdifference correlation; rankdifference correlation coefficient; rankorder correlation.
WordNet
rankorder correlation coefficient

noun the most commonly used method of computing a correlation coefficient between the ranks of scores on two variables
rankdifference correlation; rankdifference correlation coefficient; rankorder correlation.
WordNet
regression coefficient

noun when the regression line is linear (y = ax + b) the regression coefficient is the constant (a) that represents the rate of change of one variable (y) as a function of changes in the other (x); it is the slope of the regression line
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tau coefficient of correlation

noun a nonparametric measure of the agreement between two rankings
Kendall's tau; Kendall rank correlation.
WordNet
tetrachoric correlation coefficient

noun a correlation coefficient computed for two normally distributed variables that are both expressed as a dichotomy
tetrachoric correlation.
WordNet
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