- random variable
- Intuitively, a variable, such as height, that can take various values in a population, and such that some values have some probability of occurrence, and others a different probability (for example, there might be a probability of one in ten that a person is 5' 8'' tall, but only one in one hundred that they are 6' 8'' tall). In probability theory a random variable is a variable X that can take any one of a finite or countably infinite range of values, each with a probability. The distribution of a random variable is the set of pairs (x i, Prob X = x i), giving the probability associated with each value in the range. In the example, (5' 8'', 0.1) would be one member of the distribution of the random variable of height in a population, if 10% of the population is 5' 8'' tall.
Philosophy dictionary. Academic. 2011.
Look at other dictionaries:
random variable — n. Statistics a variable whose values are determined independently according to a probability distribution … English World dictionary
Random variable — A random variable is a rigorously defined mathematical entity used mainly to describe chance and probability in a mathematical way. The structure of random variables was developed and formalized to simplify the analysis of games of chance,… … Wikipedia
Random Variable — A variable whose value is unknown or a function that assigns values to each of an experiment s outcomes. Random variables are often designated by letters and can be classified as discrete, which are variables that have specific values, or… … Investment dictionary
random variable — Statistics. a quantity that takes any of a set of values with specified probabilities. Also called variate. [1935 40] * * * In statistics, a function that can take on either a finite number of values, each with an associated probability, or an… … Universalium
random variable — atsitiktinis kintamasis statusas T sritis automatika atitikmenys: angl. random variable vok. Zufallsvariable, f rus. случайная переменная, f pranc. variable aléatoire, f … Automatikos terminų žodynas
random variable — noun a variable quantity that is random (Freq. 11) • Syn: ↑variate, ↑variant, ↑stochastic variable, ↑chance variable • Derivationally related forms: ↑vary (for: ↑ … Useful english dictionary
random variable — noun a) A quantity whose value is random and to which a probability distribution is assigned, such as the possible outcome of a roll of a dice. b) A measurable function from a sample space to the measurable space of possible values of the… … Wiktionary
Random variable — A function that assigns a real number to each and every possible outcome of a random experiment. The New York Times Financial Glossary … Financial and business terms
random variable — A function that assigns a real number to each and every possible outcome of a random experiment. Bloomberg Financial Dictionary … Financial and business terms
random variable — an outcome of a random process that has a numerical value … Medical dictionary