Mean and Median

Mean is a measure of central tendency. It is the sum of a set of values divided by the number of values in a set. In other words add up all the numbers and divide the result by how many numbers there are.

eg.
3,5,7
3+5+7=15
15/3=5

Therefor the mean is 5.


Median is also a measure of central tendency. It is  the middle number in a set of data after the data have been arranged in order.


eg.
3,0,1,7,3,2,6
0,1,2,3,3,6,7
The median is 3.


This is how you get the median if you have 2 numbers in the middle:
 -Add the 2 numbers and divide the sum by 2.


 1,2,3,4,5,6

 3+4=7
 7/2=3.5

The median is 3.5