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Multilingual Demographic Dictionary, second unified edition, English volume
Average
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The average 1 or mean 1 most frequently used in demography is the arithmetic average 2 or arithmetic mean 2 which consists of the sum of a series of quantities divided by their number.. Where the term average or mean is used without further qualification the arithmetic average is generally meant. The geometric mean 3 or geometric average 3 is sometimes used when all observed values are positive. It is the Nth root of the product of N values. A weighted average 4 or weighted mean 4 is obtained when different items are given varying importance by multiplying each item by a particular weighting factor 5 or weight 5. The median 6 is the value of the element which divides a set 7 of observations into two halves. The mode 8 is the most common or frequent value in a set of observations.
- 1. Average, n., can be used as an adjective. Mean, n., can be used as an adjective.
- 5. Weight, n. - weigh, v.
- 6. Median, n., can be used as an adjective.
- 8. Mode, n., modal, adj.