Find the median class for the below distribution.
ClassCumulative frequency10−20320−301730−402440−503350−6051
40-50
From above cumulative frequency distribution, we can see that the total number of observations n = 51.
n2=25.5
The cumulative frequency closest to and aboven2 is 33. The class corresponding to this frequency is 40-50.
Thus the median class is 40-50.