To find the mean, add the numbers and divide the sum by the number of addends. The median is the middle number in a data set that is ordered from least to greatest. When there are two middle numbers, the median is the mean of these two numbers.
The median is always going to be the number in the middle. So first you have to order your numbers from least to greatest, next you find the number in the middle and circle it, and then you have your median.
The mean is tricky if you don't do it right. What you have to do first is the simple part. You add all of the numbers you have, next when you get the total you divide that by the amount of numbers you have, and after you do that you have your mean.
86/4 = 21.5 *5 Or more, raise the score* (rounds to 22) you should have 2 lightbulbs left over but you would be 2 lightbulbs short if you were to get 21 packages as opposed to 22
