Continuous Variables

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Definition

English

Continuous Variables

In probability theory, a probability distribution is called continuous if its cumulative distribution function is continuous. That is equivalent to saying that for random variables X with the distribution in question, Pr[X = a] = 0 for all real numbers a, i.e.: the probability that X attains the value a is zero, for any number a. If the distribution of X is continuous then X is called a continuous random variable.

Portuguese

Variáveis Contínuas

Uma variável aleatória é contínua quando a probabilidade de qualquer conjunto de tamanho zero é zero, em que tamanho deve ser definido no contexto da teoria da medida. No caso de uma variável aleatória X cujo espaço amostral é um subconjunto dele, ela será contínua se, e somente se, a função de probabilidade acumulada for uma função contínua.

Reference

  • Estatística Básica (Bussab, Morettin, 2002)