Reconsider the polymer viscosity data in Exercise 6.63. Use the median of the span-two moving ranges to estimate σ and set up the individuals control chart. Compare this chart to the one originally constructed using the average moving range method to estimate σ.
Answer to relevant QuestionsUse all 60 observations on oxide thickness. (a) Set up an individuals control chart with σ estimated by the average moving range method. (b) Set up an individuals control chart with σ estimated by the median moving range ...In the semiconductor industry, the production of microcircuits involves many steps. The wafer fabrication process typically builds these microcircuits on silicon wafers, and there are many microcircuits per wafer. Each ...Diodes used on printed circuit boards are produced in lots of size 1000. We wish to control the process producing these diodes by taking samples of size 64 from each lot. If the nominal value of the fraction nonconforming is ...A control chart is used to control the fraction nonconforming for a plastic part manufactured in an injection molding process. Ten subgroups yield the data in Table 7E.9. (a) Set up a control chart for the number ...Note that in Exercise 7.29 there are only four different sample sizes; n = 100, 150, 200, and 250. Prepare a control chart that has a set of limits for each possible sample size and show how it could be used as an ...
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