what is cummulative frequency curve

Dear student,
Cumulative frequency curve or ogive is a graphical presentation of cumulative frequency (running total of frequency) distribution of a grouped data in the form of a smooth curve.
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Cumulative Frequency Curve. A curve that represents the cumulative frequency distribution of grouped data on a graph is called a Cumulative Frequency Curve or an Ogive. Representing cumulative frequency data on a graph is the most efficient way to understand the data and derive results.
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