Q. 12

Write the median class of the following distribution:

Answer :

First, we prepare the cumulative frequency table for above data

We know that median class of a data is the class-interval corresponding to cumulative frequency just greater than


N = sum of all frequencies

As N = 25 therefore


Cumulative frequency just greater than 25 is 26 which lies corresponding to class 30-40

Hence, 30-40 is median class.

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