Once our variable control charts are in statistical control for a certain variable as described in Chapters 6, 7, and 8, we can determine the process capability of our product for that variable. Most variable characteristics of a product behave like a normal distribution. There might be some variable characteristics of a product that might show skewed, bimodal, or some other nonnormal distribution behavior. However, nonnormal distribution behaviors for a variable are very rare in high-volume production.
Here we first show as an example that the population of our sensor that we analyzed in Chapter 6 shows a normal distribution behavior for its resistance. Since the mean of sample averages, , is the same as the mean for ...
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