Question

Convert the following 'less than' cumulative frequency series into 'more than' cumulative frequency series:

$\begin{array}{ccccc}\text{Marks less than}& 5& 10& 15& 20\\ \text{Cumulative Frequency}& 12& 25& 35& 55\end{array}$

Answer 1

Simple frequency series

$\begin{array}{cc}\text{Wages}& \text{f}\\ 0-5& 12\\ 5-10& 13\\ 10-15& 10\\ 15-20& 20\end{array}$

'More than' cumulative series

$\begin{array}{cc}\text{Wages}& \text{c.f}\\ \text{More than 0}& 55\\ \text{More than 5}& 43\\ \text{More than 10}& 30\\ \text{More than 15}& 20\end{array}$