How do you calculate a weighted average?


Quick Answer

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.

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Full Answer

  1. Determine the data values

    Determine the value of each data in the set. These are referred to as "x" in the formula.

  2. Find the product of w and x

    Multiply each data value, x, by its weight, w.

  3. 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.

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