Estimate process capability using the x and R charts for the power supply voltage data in Exercise 6.8 (note that early printings of the 7th edition indicate Exercise 6.2). If specifications are at 350 ± 50 V, calculate Cp, Cpk, and Cpkm. Interpret these capability ratios.
Answer to relevant QuestionsFind the sample size required to construct an upper nonparametric tolerance limit that contains at least 95% of the population with probability at least 0.95. How would this limit actually be computed from sample data? The data in Table 9E.1 represent individual observations on molecular weight taken hourly from a chemical process. The target value of molecular weight is 1,050 and the process standard deviation is thought to be about σ = ...Consider the “minute clinic” waiting time data in Exercise 6.66. These data may not be normally distributed. Set up a EWMA control chart using = 0.1 for monitoring this process. Does the process seem to be in ...Consider the velocity of light data introduced in Exercises 6.69 and 6.70. Use only the 20 observations in Exercise 6.69 to set up a CUSUM with target value 734.5. Plot all 40 observations from both Exercises 6.69 and 6.70 ...Reconsider the data in Exercise 9.8. Set up and apply an EWMA control chart to these data using = 0.05 and L = 2.6. 5.634, CL = 0 = 175, UCL = 177.30, LCL = 172.70.
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