Under this method, the value of median is located from a table with the following model in the manner explained as under:

**Formula**

The fundamental model for determining the median is given by

M = Value of m or M = Value of N+1 /2th item

N = Number of items arranged in an order.

**In case of Individual and Discrete Series.**

The above formula of median holds good in case of both individual, and discrete series. But in case of a continuous series, the following two types of formula are to be used in turn:

**In case of Continuous Series**

**To find out the median item**

M = Value of m, or

M = Value of N/2 th item

Here, m = median item i.e. N/2 th item

**To Interpolate the Exact Value of Median**

Where M = median

L_{1} = lower limit, and L_{2} = upper limit of the median class,

f1 = frequency of the median class,

m = median item i.e. N/2th item, and

c = cumulative frequency of the class that precedes the median class

**Steps for Determination of Median**

- First, arrange the series in a table in ascending or descending order if it is given otherwise.
- Then, find out the cumulative frequencies in a separate column headed by CF.
- Then, find out the median item by applying the formula N+1/2 [ N/2 In case of continuous series]
- Then, locate the value of the median (median class in case of a continuous series) in the value column with reference to the median item in the cumulative frequency column.
- In case of a continuous series, from the median class so located, determine the value of the median by applying any of the formula of interpolation cited as under: