| 单词 | weighted average |
| 释义 | weighted average = weighted mean An arithmetic average that takes into account the importance of the items making up the average. For example, if a person buys a commodity on three occasions, 100 tonnes at £70 per tonne, 300 tonnes at £80 per tonne, and 50 tonnes at £95 per tonne, the purchases total 450 tonnes; the simple average price would be (70 + 80 + 95)/3 = £81.7. The weighted average, taking into account the amount purchased on each occasion, would be \\[(100 * 70) + (300 * 80) + (50 * 95)\\]/450 = £79.4 per tonne. In calculating the value of a share index, the share prices are weighted to reflect the volume of shares traded at a particular price. An unweighted average is an average calculated on the basis of price only, irrespective of quantity. |
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