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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A data has 25 observations arranged in a descending order. Which observation represents the median?
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