Mean - JSS3 Mathematics Lesson Note
The mean (average) of a data set is the sum of all values divided by the number of values.
Example:
Consider the data set:
12,8,5,17,10.
Calculate the mean:
Mean= 12+8+5+17+10/5
= 52/5
=10.4
So, the mean of this data set is 10.4.