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.

If \(N\) is odd, then:

\(\text{Median} =\)

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

\(term\)

If \(N\) 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