What the standard deviation really tells you is that some set of users were + or - the test average (or arithmetic mean).

标准偏差真正能够告诉您的是，某些用户是高于还是低于平均测试水平(或者算术含义)。

youdao

The selections of 150 for dimensional parameters and 4000 for the total deviation are designed to acquire the typical shaking motions of an average user.

空间参数选择150及总偏差选择4000都旨在检测一般用户的典型震动动作。

youdao

Comparing the ratio of standard deviation to the average for these two distributions shows that they are similar.

把这一标准差和两次的平均值相比较，我们就能发现他们很相像，（因为我们知道重力加速度是个常数）。

youdao

And when we're talking about the amplitude of the wave, we're talking about the deviation from that average level. So, if we define the average level as zero, you can have either a positive amplitude or a negative amplitude.

当我们讨论一个波的振幅时,我们说的是偏离平均位置的量,如果我们把平均位置,定义为零的话，那幅值不是,正的就是负的，有时候人们在。

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It is also more than one standard deviation below the historical average of 30%, making this an unusually low reading.

FORBES: AAII Survey: Big Jump In Bullish Sentiment

Nonetheless, optimism remains more than one standard deviation above its historic average of 39%-a sign that it remains at high levels.

FORBES: Bulls Slip But Don't Fall

Pessimism not only stayed at its lowest level since December 23, 2010, it also remained at a reading that is more than one standard deviation below the historical average of 30%.

FORBES: AAII Survey: Individual Investors Stay Optimistic