Calculate the median from the following data:
Marks below: 10 20 30 40 50 60 70 80
No. of students: 15 35 60 84 96 127 198 250

First we prepare the following cummulative table to compute the median.

Here,

So,

Thus, the cumulative frequency just greater than 125 is 127 and the corresponding class is .

Therefore, is the median class.

Here,

We know that


                
            

Hence, the median is 59.35.

  • 0
What are you looking for?