The average size is 3,131 square feet, with a standard deviation of 655 square feet. (Standard deviation is a statistical measure of variance.)

平均大小为 3,131 平方英尺，标准偏差为 655 平方英尺（标准偏差是一个描述差异的统计量度）。

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The Gini coefficient, a standard statistical measure of inequality, has fallen steadily since 2001 (though it remains very high by international standards).

吉尼系数(测量所得分配公平与否的统计指标)从2001年起开始稳定下降，但以国际标准来看仍然偏高。

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Amihud uses a statistical measure called "R-squared" to observe how much of active fund managers' returns can be explained simply by the index.

WSJ: Upside: How to Find a Fund Manager Who Can Beat the Market

As a scientist, he knew that the median was merely a statistical measure, signifying that half the patients lived this long and half did not.

FORBES: Do Oncologists Lie to Their Patients About Their Prognoses?

This is a statistical measure designed to show how well a school has helped its pupils progress since they arrived from primary school, taking into account their different starting points.

BBC: Guide: Secondary league tables