Median: Grade 4

Median: The middle of a set of numbers or values. 

If the number of values is Odd then the Median is the middle of the set of values.

15, 14, 10, 8, 12, 8, 16

First we arrange the numbers in numerical Order: 

1. 8, 8, 10, 12, 14, 15, 16

Second we find the middle number. Since there are seven numbers the median is the middle position. Therefore the median is 12. 

2. 8, 8, 10, 12, 14, 15, 16

If the number of values is Even however the Median becomes the average of the two middle values. 

15, 14, 10, 8, 12, 8, 16, 13

First we put them in numerical order. 

8, 8, 10, 12, 13, 14, 15, 16

Next we realize that the number of points here is equal so we have to find what number comes between the two middle points. The two middle points are 12 and 13. We can look at them and either realize that 12.5 is between them or we can add a divide by 2 to get the average.