How to find the median when, we have got "x" and "f"(frequency)

Dear Student,

 

The median is the middlemost value in a data, when arranged in increasing order

Here, the data is already in increasing order, and the  total number of observations = 35

Hence the middlemost observation will be the 18^th one.

If we expand the data as follows:

1,1,1,2,2,2,2,2,2,3,3,3,3,3,3,3,3,3,4,.....

 

The 18^th observation is 3

OR

we can simply add up the frequency f, till we reach 18, to know the corresponding observation value

 

Regards Topperlearning.