Calculate the weighted average of a data set using the formula w1x1 + w2x2 + … wnxn. It involves multiplying each number by its weight and then summing up their products. You need the data values, or x, and the data value's weights, or w.
- Determine the data values
Determine the value of each data in the set. These are referred to as "x" in the formula.
- Find the product of w and x
Multiply each data value, x, by its weight, w.
- Calculate the weighted average
Using the formula for finding a weighted average, find the sum of all the products of the numbers and their respective weights. This is the weighted average.