Q. 63.8( 15 Votes )

The number of books in different shelves of a library are as follows:

30, 32, 28, 24, 20, 25, 38, 37, 40, 45, 16, 20

19, 24, 27, 30, 32, 34, 35, 42, 27, 28, 19, 34

38, 39, 42, 29, 24, 27, 22, 29, 31, 19, 27, 25

28, 23, 24, 32, 34, 18, 27, 25, 37, 31, 24, 23,

43, 32, 28, 31, 24, 23, 26, 36, 32, 29, 28, 21

Prepare a cumulative frequency distribution table using 45-49 as the last class0interval.

Answer :

Minimum number of book shelves is 16 and maximum number of book shelves is 45.


Range = Maximum number of book shelves – Minimum number of book shelves


= 45 – 16


= 29


Given, Class interval is 45-49. So, class size = 49 – 45


= 4


Therefore, No. of classes =


= = 7.25


Number of classes = 8


The cumulative distribution frequency is as follows:


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