For a shewhart control chart using 3-sigma


4. For a Shewhart control chart using 3-sigma limits, how often is a type I error expected to occur? If the samples are taken every 10 minutes, what is the average time to signal? If the sample size (n) is 10, what is the number of individual items that are likely to be taken before a shift is detected? What additional information would be required to calculate the probability of a type II error?

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