Friday, June 18, 2010

heteroskedastic

In statistics, a sequence or a vector of random variables is heteroskedastic, or heteroscedastic, if the random variables have different variances. The complementary concept is called homoskedasticity. The term means "differing variance" and comes from the Greek "hetero" ('different') and "skedasis" ('dispersion').

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talk nineteen to the dozen

  to speak rapidly and without stopping