Applied Statistics and Probability for Engineers 6th Edition solutions

Applied Statistics and Probability for Engineers 6
An early example of SPC was described in Industrial Quality Control [The Introduction of Quality Control at Colonial Radio Corporation (1944, Vol. 1(1), pp. 49)]. The following are the fractions defective of shaft and washer assemblies during the month of April in samples of \(n=1500\) each:

Applied Statistics and Probability for Engineers 6
Suppose that the following fraction defective has been found in successive samples of size 100 (read down): (a) Using all the data, compute trial control limits for a fraction-defective control chart, construct the chart, and plot the data. (b) Determine whether the process is in stat

Applied Statistics and Probability for Engineers 6
The following are the numbers of defective solder joints found during successive samples of 500 solder joints: (a) Using all the data, compute trial control limits for a fraction-defective control chart, construct the chart, and plot t

Applied Statistics and Probability for Engineers 6
The following represent the number of defects per 1000 feet in rubber-covered wire: 1, 1, 3, 7, 8, 10, 5, 13, 0, 19, 24, 6, 9, 11, 15, 8, 3, 6, 7, 4, 9, 20, 11, 7, 18, 10, 6, 4, 0, 9, 7, 3, 1, 8, 12. Do the data come from a controlled process?

Applied Statistics and Probability for Engineers 6
The following represent the number of solder defects observed on 24 samples of five printed circuit boards: 7, 6, 8, 10, 24, 6, 5, 4, 8, 11, 15, 8, 4, 16, 11, 12, 8, 6, 5, 9, 7, 14, 8, 21. (a) Using all the data, compute trial control limits for a U control chart, construct the chart, and plot th

Applied Statistics and Probability for Engineers 6
Consider the data on the number of earthquakes of magnitude 7.0 or greater by year in Exercise 6-87. (a) Construct a U chart for this data with a sample size of n=1. (b) Do the data appear to be generated by an in-control process? Explain.

Applied Statistics and Probability for Engineers 6
In a semiconductor manufacturing company, samples of 200 wafers are tested for defectives in the lot. See the number of defectives in 20 such samples in the following table. (a) Set up a \(P\) chart for this process. Is the process in statistical control? (b) Suppose that instead of samples of s

Applied Statistics and Probability for Engineers 6
The following data are the number of spelling errors detected for every 1000 words on a news Web site over 20 weeks. (a) What control chart is most appropriate for these data? (b) Using all the data, compute trial control limits for the chart in part (a

Applied Statistics and Probability for Engineers 6
A article of Epilepsy Research [Statistical Process Control (SPC): A Simple Objective Method for Monitoring Seizure Frequency and Evaluating Effectiveness of Drug Interventions in Refractory Childhood Epilepsy, (2010, Vol 91, pp. 205213)] used control charts to monitor weekly seizure changes in patie

Applied Statistics and Probability for Engineers 6
A article in Graefes Archive for Clinical and Experimental Ophthalmology [Statistical Process Control Charts for Ophthalmology, (2011, Vol. 249, pp. 11031105)] considered the number of cataract surgery cases by month. The data are shown in the following table. (a) What type of control chart is approp