It is the standard deviation of price fluctuations expected over a set timeline (30 days for the MOVE and the VIX), assuming they are distributed along a bell curve and that options are priced accordingly.

是在给定时间线（MOVE指和VIX指均为30天）内预期价格波动标准偏差，假设是价格波动沿着钟形曲线分布，并且期权是据此定价。

Remember, z-score is just how many standard deviations you are away from the mean.

记住，z-score 就是您与平均值之间标准偏差。

The other purpose is to estimate the standard deviation of the measurement system.

另一个目是估计测量标准偏差。

Let's say 2.79 is the standard deviation.

假设2.79是标准偏差。

If we were to go another standard deviation, we'd go 7.1 more.

如果我们要采用另一个标准偏差，我们会再采用 7.1。

By the way, this is where you calculate the standard deviation of the measurement system – the second use of the moving range chart.

顺便说一句， 这是计算测量标准偏差地方——移动极差图第二次使用。

When I only took 4 steps the standard deviation was 1.

当我仅走了4步时，标准偏差为1。

This is the length of measurement system standard deviation leg of the right triangle. The measurement system variance is the square of this number.

这是测量标准偏差直角三角形边长度。测量方差是该字平方。

Determine the precision of the measurement system by calculating the standard deviation of the measurement system from the moving range chart.

通过根据移动极差图计算测量标准偏差来确定测量精度。

You can also compare the standard deviation to the specification range.

您还可以将标准偏差与规格范围进行比较。

However, if the measurement standard deviation becomes too large, it will begin to have the largest impact.

然而， 如果测量标准偏差变得太大，它将开始产生最大影响。

Most of the time, the precision of a measurement system is reported as an estimated standard deviation.

大多时候， 测量精度以估计标准偏差形式报告。

Since the range chart is in control, we can estimate the measurement system standard deviation.

由于范围图处于控制之中， 我们可以估计测量标准偏差。

Suppose you have done that and your process standard deviation is 2.5.The specifications for hardness are 30 to 38.

假设您已经这样做了， 并且您过程标准偏差为 2.5。 硬度规格为 30 到 38。

The other calculations are shown below for the other standard deviations from the Average and Range method in Table 3.

下面显示了表 3 中平均值和范围方法其他标准偏差其他计算。

The second is to estimate the standard deviation of the measurement system.

第二是估计测量标准偏差。

It can come from a control chart kept in production or from calculating the standard deviation from a large amount of production data (be wary of special causes).

它可以来自生产中保存控制图， 也可以来自计算大量生产据标准偏差（警惕特殊原因）。