An article in Industrial and Engineering Chemistry (“More on Planning Experiments to Increase Research Efficiency,” 1970, pp. 60–65) uses a 25−2 design to investigate the effect of A = condensation temperature, B = amount of material 1, C = solvent volume, D = condensation time, and E = amount of material 2, on yield. The results obtained are as follows:
Answer to relevant QuestionsSet up a 28-4 fractional factorial design. Verify that this is a resolution IV design. Discuss the advantage of a resolution IV design relative to one of lower resolution. Reconsider the crack experiment from Exercise 13.19. Suppose that the two crack-length measurements were made on two cracks that formed in the same test coupon at each set of test conditions. Are the two observations ...Consider the leaf spring experiment in Exercise 14.9. Rework this problem, assuming that factors A, B, and C are easy to control but factors D and E are hard to control. Using equations (14.6) and (14.7), the mean and ...Consider the response model in equation 14.5 and the transmission of error approach to finding the variance model (equation 14.7). Suppose that in the response model we use What effect does including the interaction terms ...An accounting firm uses sampling methods in its client auditing processes. Accounts of a particular type are grouped together in a batch size of 25. The auditor is concerned about erroneous accounts escaping the auditing ...
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