The marks obtained by 25 students in a class are as follows :

22, 28, 30, 32, 35, 37, 40, 41, 43, 44, 45, 45, 48, 49, 52, 53, 54, 56, 56, 58, 60, 62, 65, 68, 69,

(i) Arrange the above data on frequency distri-bution taking class interval.

20-29, 30-39, 40-49, 50-59, 60-69

(ii) Form the cumulative frequency distribution also.

Here, we can convert given data into frequency

distribution and cumulative frequency distribution by using tally bar and inclusive series :