Question

What is the median of the following data: 1, 4, 7, 3, 9, 5, 3, 2, 7.

• A. 1
• B. 2
• C. 3
• D. 4

Answer 1

The correct option is D

4

We know that,
The median value or simply the median of a given number of observations is the middlemost value when the observations are arranged in ascending or descending order.

For odd number of observations the median is $(\frac{n+1}{2}{)}^{th}$ observation

Now,
arranging the data in ascending order we get,
1, 2, 3, 3, 4, 5, 7, 7, 9

Now median,
$=(\frac{9+1}{2}{)}^{th}$ observation
$=5^{th}$ observation i.e. 4.

So, 4 is the median of the given data.