Question: The data in Table 6E 18 are the number of information
The data in Table 6E.18 are the number of information errors found in customer records in a marketing company database. Five records were sampled each day. Set up a c chart for the total number of errors. Is the process in control?
Answer to relevant QuestionsKaminski et al. (1992) present data on the number of orders per truck at a distribution center. Some of this data is shown in Table 6E.19. Set up a c chart for the number of orders per truck. Is the process in control? A control chart for the fraction nonconforming is to be established using a center line of . What sample size is required if we wish to detect a shift in the process fraction nonconforming to 0.20 with probability 0.50? a. Derive an item-by-item sequential-sampling plan for which p1 = 0.02, α = 0.05, p2 = 0.15 and β = 0.10. b. Draw the OC curve for this plan. a. Find the appropriate Dodge–Romig plan. c. What is the LTD protection for this plan? a. Draw the type-A OC curve for the plan. b. Draw the type-B OC curve for this plan and compare it to the type-A OC curve found in part (a). c. Which curve is appropriate for this situation?
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