mean
Mean is the ‘middle’ value of a set of numbers. We sometimes use ‘average’ for mean.
In order to calculate the mean of a set of data, we add the sum of the values and divide that sum by the number of values in the set.
For example, there are 5 monkeys in a zoo. Here are their weights:
-
Monkey 1 = 68 kg
Monkey 2 = 68 kg
Monkey 3 = 49 kg
Monkey 4 = 51 kg
Monkey 5 = 44 kg
Mean =
=
= 56
The mean is 56 kg.
We sometimes refer to ‘mean’ as ‘arithmetic mean’.