落在一个标准偏差之外的概率是1/3,两个标准差之外的概率是1/20,三个标准差之外是百分之一

One standard deviation happens one draw out of three, two standard deviations one out of twenty, three standard deviations is one out of one hundred.

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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。

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.

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对于参数估计量的标准差，我们则是利用拔靴法来估计，其结果的表现也与仿真的标准差很接近。

Results show that the proposed weighted regression calibration method is the most efficient and that the standard errors estimated using a bootstrap procedure are satisfactory.

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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

But if I would confine myself just to stocks and bonds, then I would get a much higher standard deviation.

但若组合里只有股票和债券，我的标准差会高得多。

耶鲁公开课 - 金融市场课程节选