The cumulative frequency of a random variable X for the value x is the number of observations such that X ? x.
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The cumulative frequency of a random variable X for the value x is the number of observations such that X ≤ x.
No it is not. The ogive is a graph that represents the cumulative frequencies for the classes in a frequency distribution.
ogive
According to Anderson, Sweeney Williams book Essential of Statistics For Business and Economics, 4e Edition, 2006 p. 34 cumulative frequency distribution is "a variation of the frequency distribution that provides another tabular summary of quantitative data." In simple terms, the cumulative frequency distribution is the sum of the frequencies of all points or outcomes below and including the current point.
Not directly, but the cumulative frequency contains the same information as the frequencies for the values in question. However, it may not show the full details of the distribution if the values have been grouped.
Ogives are often used in statistics to represent the cumulative frequencies for the classes in a frequency distribution.