Question

What is the sum of all frequencies in a frequency distribution? and why is the sum of all relative frequencies equal to 1?

Answer 1

Cumulative Frequency:

The sum of all the frequencies for all classes is equal to the number of elements in the given data and that summation is termed as the cumulative frequency which defines the number of entries of that statistical data.

The sum of relative frequencies is also equal to one, since the sum of all fractional parts must equal the whole.

Explanation: