Question

Construct a frequency distribution table from the following cumulative frequency distribution:-
(i)
$\begin{array}{cc}\text{Class Interval}& \text{Cumulative Frequency}\\ 10-19& 8\\ 20-29& 19\\ 30-39& 23\\ 40-49& 30\end{array}$

(ii)
$\begin{array}{cc}\text{Class Interval}& \text{Cumulative Frequency}\\ 5-10& 18\\ 10-15& 30\\ 15-20& 46\\ 20-25& 73\\ 25-30& 90\end{array}$

Answer 1

(i) The frequency distribution table is as below:
$\begin{array}{cc}\text{Class Interval}& \text{Frequency}\\ 10-19& 8\\ 20-29& 11\\ 30-39& 4\\ 40-49& 7\end{array}$

(ii) The frequency distribution table is as below:
$\begin{array}{cc}\text{Class Interval}& \text{Frequency}\\ 5-10& 18\\ 10-15& 12\\ 15-20& 16\\ 20-25& 27\\ 25-30& 17\end{array}$