It can be computed using the arithmetic mean method, which uses the sum of the numbers ... example is 6.5. A = 4+9/2 Arithmetric Mean = 6.5 Investopedia The geometric mean uses a more complex formula.

To calculate the mean, you add up all the numbers in the set, then divide the total by the number of numbers you added. The mean might not always be a whole number it might be a decimal.