If there are even number of observations in a data set, then the median can be calculated as below:

Step 1: Arrange the data either in ascending or in descending order.

Step 2: If the number of observations (say n) are even, then identify (n/2)^th and [(n/2) + 1]^th observations.

Step 3: The average of the above two observations (which are identified in step 2) is the median of the given data.

Median = 1/2 [(n/2)^th]+ (n/2 +1)^th]