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Question

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 distribution taking class interval.

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

(ii) Form the cumulative frequency distribution.

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Solution

(i) The frequency distribution of given data is shown below

(ii) The cumulative frequency distribution of the given data is shown below

Class - IntervalExclusive GroupFrequency (f))202919.529.52303929.539.54404939.549.58505949.559.56606959.569.55 N=25

Class - IntervalCumulative Frequency (cf))Less than 29.52Less than 39.56Less than 49.514Less than 59.520Less than 69.525


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