Question: and R charts with n 4 are used
and R charts with n = 4 are used to monitor a normally distributed quality characteristic. The control chart parameters are
Both charts exhibit control. What is the probability that a shift in the process mean to 790 will be detected on the first sample following the shift?
Answer to relevant QuestionsConsider the chart in Exercise 6.55. Find the average run length for the chart. The following x and s charts based on n = 4 have shown statistical control: (a) Estimate the process parameters µ and σ. (b) If the specifications are at 705 ± 15, and the process output is normally distributed, estimate ...Michelson actually made 100 measurements on the velocity of light in five trials of 20 observations each. The second set of 20 measurements is shown in Table 6E.28 (a) Plot these new measurements on the control charts ...The vane heights for 20 of the castings from Figure 6.25 are shown in table 6E.32. Construct the “between/within” control charts for these process data using a range chart to monitor the within-castings vane height. ...A control chart indicates that the current process fraction nonconforming is 0.02. If 50 items are inspected each day, what is the probability of detecting a shift in the fraction nonconforming to 0.04 on the first day after ...
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