Finite Math Examples
Find the midpoint for each class.
Multiply the frequency of each class by the class midpoint.
Simplify the column.
Add the values in the column. In this case, .
Add the values in the frequency column. In this case, .
The mean (
mu ) is the sum of divided by , which is the sum of frequencies.
The mean is the sum of the product of the midpoints and frequencies divided by the total of frequencies. In this case, .
Simplify the right side of to get .