Question

what is the cumulative frequency when there is no preseding frequency
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Answer 1

Answer:

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.

Answer 2

Answers:

First, add the number from the Frequency column to its predecessor.  

However in Stem 1, there are two observations.  

In Stem 2, there are three observations.  

Continue these calculations until you have added up all of the numbers in the Frequency column.

Record the results in the Cumulative frequency column.