random 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
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.