Frequency table

A frequency table is a simple table of the frequencies in each class.

There are many ways of expressing the frequencies:

Statistic	Purpose
Frequency	The number of occurrences in the class.
Relative frequency	The frequency divided by the total.
Frequency density	The relative frequency divided by the width of the class interval. Use with unequal class intervals.
Cumulative frequency	The number of occurrences in the class and all previous classes.
Cumulative relative frequency	The cumulative frequency divided by the total.

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