Introduction to median — lesson. Mathematics State Board, Class 7.

PDF chapter test TRY NOW

Median is also one of the ways to measure the central tendency of the given set of data.

Median:

When a set of numbers is arranged in ascending order or descending order, the middle term constitutes the set's median.

Steps to find the median:

Step

$1$ : Arrange the numbers in ascending or descending order.

Step

$2$ : Count the number of entries,

$N$ , on that set.

Step

$3$ : Find the middle term using the formulae given below.

$N$ is odd, then:

$\text{Median} =$

${(\frac{N + 1}{2})}^{th}$

$term$

$N$ is even, then the median is the average

${(\frac{N}{2})}^{th}$ and

${(\frac{N}{2} + 1)}^{th}$ terms.

That is,

$\text{Median} =$

$\frac{1}{2}$

$\Bigg[$

${(\frac{N}{2})}^{th} term + {(\frac{N}{2} + 1)}^{th} term$

$\Bigg]$

Did you find an error?

4. Introduction to median