Question

In grouped data, what does the cumulative frequency 'cf' in the percentile formula represent?

Options

• Frequency of percentile class

• Number of classes in the data

• Lower limit of percentile class

• Total frequency for all preceding classes

Answer 1

Total frequency for all preceding classes

Explanation:

In the percentile calculation for grouped data, 'cf' stands for the cumulative frequency of all classes before the percentile class, which is necessary to locate the percentile position in the distribution.​