# random variance of increment collection

*(unit variance)*,**S**,_{r}^{2}__n__the theoretical variance calculated for a uniformly mixed lot and extrapolated to 0.5-kg (1-lb) increment size.**D2234/D2234M**

*ASTM D121-09a Standard Terminology of Coal and Coke.
2014.*

### Look at other dictionaries:

**variance**— n the mean square of deviations (or errors) of a set of observations; the sum of squared deviations (or errors) of individual observations with respect to their arithmetic mean divided by the number of observations less one (degrees of freedom);… … Coke&Coal Terminology**river**— river1 riverless, adj. riverlike, adj. /riv euhr/, n. 1. a natural stream of water of fairly large size flowing in a definite course or channel or series of diverging and converging channels. 2. a similar stream of something other than water: a… … Universalium**Path integral formulation**— This article is about a formulation of quantum mechanics. For integrals along a path, also known as line or contour integrals, see line integral. The path integral formulation of quantum mechanics is a description of quantum theory which… … Wikipedia