Any information given different weights in calculation or data in which values for some cases have been ..

Score expressed as a deviation from the mean value, in standard deviation units.

Any quantity that varies. Any attribute, phenomenon or event that can have different values.

A measure of the variation shown by a set of observations, defined by the sum of the squares of deviations ..

Systematically tabulated information concerning births, marriages, divorces, separations and deaths, ..

The extent to which a measurement, test or study measures what it purports to measure. There are various ..

A complete system of theory and practices that has evolved independently of, and often prior to, the conventional ..

Health care practices that are not currently an integral part of conventional medicine. The list of these ..

A system of medicine based on the theory that successful therapy depends on creating a condition antagonistic ..