Figure 1producers risk Chapter 10 The amount of inspection is optimal when the sum of the costs of inspection and passing defectives is minimized . Finally, note that the sampling distribution is approximately Normal. This is true even if the process distribution is not normal. c entral limit theorem size increases distribution of sample averages approaches a normal distribution regardless of the shape of the sampled population. This means that the likelihood that close to the true value in the population is higher for large samples than for small samples . Outside limits assigned, within random. Using wider limits (e.g., ± 3 Sigma limits) reduces the probability of a Type I error. However, wider limits make it more diffic variations (i.e., a shift in the process) if they are present . APLHA RISK = TYPE 1 ERROR = Average of sample ranges of a few samples If STD is not known. Can use for
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- Fall '12