Find the median of the following data:

We have n = 190

So,

The cumulative Frequency just greater than is 120 then the median class is 15 – 20 such that

the lower limit (l) = 15

cumulative frequency of the class preceding 15 – 20 (cf) = 92

the frequency of the median class 15 – 20 =28,

class size (h) = 5

Using the formula, , we have

= 15 + 0.53

= 15.53