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 precision of an analytical procedure is usually expressed as the standard deviation or relative standard deviation (coefficient of variation) of a series of measurements.

分析规程的精密度通常以一系列测量数值的标准差或相对标准差(变异系数)来表示。

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Experiment results shows the rate of recovery is 100%, the standard deviation is 2.04, the relative standard deviation is 2.04%.

应用该法测定腐肥中的硼测定回收率为100%，标准偏差为2.04，相对标准偏差为2.04%。

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That's got the lowest possible standard deviation of expected return and that's 25% stocks and 75% bonds with this sample period.

这个组合预期回报的标准差最小,在这一点上，投资组合,由25%的股票和75%的债券构成。

耶鲁公开课 - 金融市场课程节选

It shows the standard deviation of the return on the portfolio as a function of the expected return on the portfolio.

它是投资组合的收益标准差,关于预期收益率的函数图像。

耶鲁公开课 - 金融市场课程节选

And then I could also do a Gaussian one here, with the mean of and the standard deviation of volatility divided by 2.

然后我在这里再写一个高斯分布的函数，它的浮动值的平均值和,标准偏差值都除了2。

麻省理工公开课 - 计算机科学及编程导论课程节选

The standard deviation of returns for quadruple witching expiration weeks is only 2.2% which is considerably less than typical weeks, with a standard deviation of returns of more than 3%.

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In STAC (The Securities Technology Analysis Center) benchmarking, Solarflare and IBM achieved a top tested speed of 2.3 million messages per second with a mean latency of 14 microseconds and a standard deviation of latency at 2 microseconds using standard Ethernet and UDP protocols.

FORBES: HPC -- Solarflare Server Adapters Cut Through I/O Bottlenecks

Thus, a reading above 50% for bullish sentiment would be one standard deviation above average and a reading of 41% for bearish sentiment would be one standard deviation above the average.

FORBES: How Much Should You Rely On Sentiment Surveys?