Definition of random variable in US English:

random variable


  • A quantity having a numerical value for each member of a group, especially one whose values occur according to a frequency distribution.

    Also called variate
    • ‘Chernoff bounds are the most useful for sums of bounded independent random variables.’
    • ‘An alternative approach is to consider allelic frequencies as random variables, whose distribution depends on some parameters of the population model.’
    • ‘In this case, the numbers of people wanting to buy tickets at a given fare are random variables.’
    • ‘The error terms from the regression equations are modeled as random variables with a probability distribution.’
    • ‘For example, the correlation coefficient between two random variables is zero not only in the case of independence, but whenever there is no linear association.’