Mean, Mode, Median, Range

3. Median

The median is the middle value.

To work out the median:

Let we have the numbers 7, 9, 11, 6, 13, 6, 6, 3, 11

Step 1:    

Put the numbers in order:

3, 6, 6, 6, 7, 9, 11, 11, 13

Step 2:    

The number in the middle of the list is the median.

So the median value is 7.

If there are two middle values, the median is halfway between them. 

Work out the median for this set of numbers 3, 6, 6, 6, 7, 8, 9, 11, 11, 13

There are two middle values, 7 and 8.

The median is halfway between 7 and 8, so the median is 7.5

4. Range

The range is the difference between the biggest and the smallest number.

To work out the range:

Let we have the numbers 3, 6, 6, 6, 7, 9, 11, 11, 13

Step 1:

Put the numbers in order as 3, 6, 6, 6, 7, 9, 11, 11, 13

Step 2:

Subtract the smallest number from the biggest number:

13 - 3 = 10

So the range of this set of numbers is 10.