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Question

The marks obtained by 40 students of a class in an examination are given below.
3, 20, 13, 1, 21, 13, 3, 23, 16, 13, 18, 12, 5, 12, 5, 24, 9, 2, 7, 18, 20,3,10, 12, 7, 18, 2, 5, 7, 10, 16, 8, 16, 17, 8, 23, 24, 6, 23, 15.
Present the data in the form of a frequency distribution using equal class size, one such class being 10-15 (15 not included).


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Solution

Sol:

Minimum observation is 1 and maximum observation is 24. The classes of equal size from the given data are:

(0-5), (5-10), (10-15), (15- 20), (20-25)

Thus, the frequency distribution may be given as under:

https://lh3.googleusercontent.com/6Ck2v1e3KzlNWoLDZq0BNC10GTFjI-aWts-y2_1mgCypiwgO06EWO61OjMgc82dZTSEsgZLn0-yjAezdsZPpZ8PbYL75yv18Zcblb2XOUQcnCwyM4MV5vxRHHGitNVNZz3J7Fq-w


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