Question: Why is the np chart not appropriate with variable sample
Why is the np chart not appropriate with variable sample sizes?
Answer to relevant Questionsa. Find the three-sigma limits for this chart. Consider the papermaking process in Exercise 6.15. Set up a u chart based on an average sample size to control this process. In exercise The number of workmanship nonconformities observed in the final inspection of disk-drive assemblies has been tabulated as shown in Table 6E.14. Does the process appear to be in control? Construct an appropriate control chart to monitor the rate at which CAT scans are performed at this clinic. A maintenance group improves the effectiveness of its repair work by monitoring the number of maintenance requests that require a second call to complete the repair. Twenty weeks of data are shown in Table 6E.7. a. Find ...
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