# random variable

(redirected from*stochastic variable*)

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## ran·dom var·i·a·ble

a variable that may assume a set of values, each with fixed probabilities or probability densities (its distribution), in such a way that the total probability assigned to the distribution is unity; the random variable may be discrete, continuous, or mixed discrete-continuous.

## random

unplanned, without direction or purpose.

**random assignment**

see randomization.

**random mating**

where each member of the population has an equal opportunity of mating with every member of the opposite sex.

**random numbers**

a list of numbers obtained by a standard randomization procedure; used commonly to select individual animals from a pack.

**random sample**

see random sample.

**random sampling**

a procedure for selecting units from a group in such a way that each unit has an equal chance of being selected in the sample.

**random selection**

selection in such a way as to produce a random sample.

**random variable**

a group or quantity that takes various values, each with varying probabilities.

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