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cumulative distribution function
cumulative distribution function A cumulative distribution function is a way of describing how values are distributed in a population by showing, for any chosen value, how much of the population falls at or below it.
A cumulative distribution function is a way of describing how values are distributed in a population by showing, for any chosen value, how much of the population falls at or below it. In survey research, estimating this function helps researchers understand the distribution of a characteristic in a finite population, even when data come from complex sampling designs and some people do not respond.