使用描述性统计， 计算Delta 的标准差
Using Descriptive Statistics, calculate the standard deviation of Delta
这个标准差被称为测量标准误差
This standard deviation is called the Standard Error for Measurement
其主要代表了什么，重复性还是再现性？
Which does this primarily represent, Repeatability or Reproducibility?
使用上面的标准差，什么是测量分布的良好估计值
Using the standard deviation above, what would be a good estimate of measurement spread?
假设公差是5 （上限－下限）
Suppose tolerance (upper spec - lower spec) is 5.
精确度和公差的比率如何？
What would be the ratio between the precision and the tolerance?


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