What Is a Weighted Salary Average?

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What Is a Weighted Salary Average?
Weighted averages are used to obtain relevant salary figures. (dollars image by peter Hires Images from Fotolia.com)

Weighted averages are used by both employers and surveyors determining average salary information in order to give a more accurate salary representation than a typical average salary.

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Benefits

Policy makers use weighted average salaries to see disparities in salaries among employees. It gives a more accurate salary figure since it eliminates biases in information by giving all workers equal weight in determining an average salary figure. This also gives a more complete picture of total compensation since it typically includes benefits.

Weighted Averages

Weighted averages are determined by summing all salaries and dividing by the number of incumbents so every worker is given equal treatment. Therefore, every salary has equal weight in the average to give a more accurate representation and eliminate disparities in salary surveys caused by differences in experience and training from the various employers.

Example: Intro

For example, take two companies: Company A and Company B. Company A employs 10 workers who are each paid £19,500 per year. Company B on the other hand employs 1,000 workers who each earn £16,250 a year.

Example: Average

The true average of the companies would be £17,875 since £19,500 plus £16,250 divided by two is £17,875. This however does not give an accurate representation of the market since Company B employs so many more workers than Company A. An accurate figure, therefore should place more emphasis on the average salary of Company B.

Example: Weighted Average

For a more accurate representation of the market, it is a good idea to take the weighted average. To do so, multiply the number of workers in each firm by the firm for that salary. Then all these figures together and divide by the total number of workers. For example, in this example, multiply £19,500 by 10 ($300,000) and £16,250 by 1000 ($25,000,000). Add these figures together ($25,300,000). Then divide by the total number of workers, which in this example is 1,010. This yields the weighted average of £16,282 which is much different and significantly more accurate than £17,875.

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