The mean is the average, add the numbers together and divide by the quantity of numbers:
10 + 12 + 15 + 12 + 13 + 11 + 10 + 13 = 96
96 / 8 = 12
The mean is 12
The median is the middle value.
Rearrange the numbers from smallest to largest:
10 , 10 , 11 , 12 , 12 , 13 , 13 , 15
There are an even amount of numbers, so find the middle two values, add together and divide by 2:
12 + 12 = 24 /2
Median = 12
