# Question

A sample of 20 measurements on a normally distributed quality characteristic had x = 350 and s =10 . Find an upper natural tolerance limit that has probability 0.90 of containing 95% of the distribution of this quality characteristic.

## Answer to relevant Questions

How large a sample is required to obtain a natural tolerance interval that has probability 0.90 of containing 95% of the distribution? After the data are collected, how would you construct the interval? A process is in control with x = 100.s = 1.05, and n = 5. The process specifications are at 95 ± 10. The quality characteristic has a normal distribution. (a) Estimate the potential capability. (b) Estimate the actual ...Consider the hospital emergency room waiting time data in Exercise 8.16. Set up a CUSUM chart for monitoring this process. Does the process seem to be in statistical control? x p50 4.55; p84 7.34; p84 ...Apply the scale CUSUM discussed in Section 9.1.8 to the concentration data in Exercise 9.8. Exercise 9.8 Reconsider the data in Exercise 9.7. Apply an EWMA control chart to these data using = 0.1 and L = 2.7. 12.16 , CL = 0 = 950, UCL = 957.53, LCL = 942.47.Post your question

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