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

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collectionofdata

#1

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.


#2

Here, we can convert given data into frequency
distribution and cumulative frequency distribution by using tally bar and inclusive series :