what is mean by Cumulative frequency distribution
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The cumulative frequency of a set of data or class intervals of a frequency table is the sum of the frequencies of the data up to a required level. It can be used to determine the number of items that have values below a particular level.
Step-by-step explanation:
The cumulative frequency is calculated by adding each frequency from a frequency distribution table to the sum of its predecessors. The last value will always be equal to the total for all observations, since all frequencies will already have been added to the previous total.
Cumulative Frequency Table (Ungrouped data)
The following table gives the frequency distribution of marks obtained by 28 students in a particular test.
Marks
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