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


Where,


N = sum of all frequencies


As N = 25 therefore


And


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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