Rate of return and standard deviation are two of the most useful statistical concepts in business. These two figures will tell you whether a business project is worth the investment and trouble, given ...

The previous example illustrates how you can create s charts using raw data (process measurements). However, in many applications, the data are provided as subgroup summary statistics. This example ...

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_MEAN_ process mean (value of central line on box chart) _R_ value of central line on R chart _S_ value of central line on s chart A subgroup standard deviation variable is included if you specify the ...

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