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Question
If 1−5,6−10,11−15,16−20,... are the classes of a frequency distribution then the lower boundary of the class 11−15 is _____
If 1−5,6−10,11−15,16−20,... are the classes of a frequency distribution then the lower boundary of the class 11−15 is _____
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Solution
The correct option is C 10.5
In order to make class intervals even we need to add 0.5 and reduce 0.5 from class boundaries
1−5 = 0.5−5.5
6−10 = 5.5−10.5
11−15 = 10.5−15.5
so , lower boundary of class 11−15 = 10.5
In order to make class intervals even we need to add 0.5 and reduce 0.5 from class boundaries
1−5 = 0.5−5.5
6−10 = 5.5−10.5
11−15 = 10.5−15.5
so , lower boundary of class 11−15 = 10.5
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