Consider an np chart with k-sigma control limits. Derive a general formula for determining the minimum sample size to ensure that the chart has a positive lower control limit.
Answer to relevant QuestionsConstruct a standardized control chart for the data in Exercise 7.11. In Exercise 7.11 The number of nonconformities found on final inspection of a tape deck is shown in Table 7E.14. Can you conclude that the process is in statistical control? What center line and control limits would you recommend for ...Find the three-sigma control limits for (a) a c chart with process average equal to nine nonconformities. (b) a u chart with c = 16 and n = 4. A control chart for nonconformities is to be constructed with c 2.0, LCL = 0, and UCL such that the probability of appoint plotting outside control limits when c = 2.0 is only 0.005. (a) Find the UCL. (b) What is the type I ...A production line assembles electric clocks. The average number of nonconformities per clock is estimated to be 0.75. The quality engineer wishes to establish a c chart for this operation, using an inspection unit of six ...
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