# Question

In their book Empirical Model Building and Response Surfaces (John Wiley, 1987), G. E. P. Box and N. R. Draper describe an experiment with three factors. The data shown in Table 8E.7 are a variation of the original experiment on p. 247 of their book. Suppose that these data were collected in a semiconductor manufacturing process.

## Answer to relevant Questions

The data shown in the Table 8E.8 were collected in an experiment to optimize crystal growth as a function of three variables . Large values of y (yield in grams) are desirable. Fit a second-order model and analyze the ...Consider the experiment in Exercise 8.4. Plot the residuals against the levels of factors A, B, C, and D. Also construct a normal probability plot of the residuals. Comment on these plots. In exercise A component has a Weibull time-to-failure distribution. The value of the scale parameter is . Suppose that the shape parameter is . Find the mean and variance of the time to failure. What is the reliability at 600 ...Consider the following 20 observations on time to failure: 702, 507, 664, 491, 514, 323, 350, 681, 281, 599, 495, 254, 185, 608, 626, 622, 790, 248, 610, and 537. Is either exponential or the Weibull a reasonable choice of ...Consider the stand-by system in the accompanying figure. The components have an exponential lifetime distribution, and the decision switch operates perfectly. The MTTF of each component is 1,000 hours. Assuming that the ...Post your question

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