Statistics for Environmental Engineers

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References


ASTM (1998). Standard Guide for Developing Appropriate Statistical Approaches for Groundwater Detection Monitoring Programs, Washington, D.C., D 6312 , U.S. Government Printing Office.


Berthouex, P. M., W. G. Hunter, and L. Pallesen (1978). “Monitoring Sewage Treatment Plants: Some Quality Control Aspects,” J. Qual. Tech., 10(4).


Box, G. E. P. and A. Luceno (1997). Statistical Control by Monitoring and Feedback Adjustment, New York, Wiley Interscience.


Box, G. E. P. and L. Luceno (2000). “Six Sigma, Process Drift, Capability Indices, and Feedback Adjustment,” Qual. Engineer., 12(3), 297-302.


Page, E. S. (1961). “Continuous Inspection Schemes,” Biometrika, 41, 100-115.


Page, E. S. (1961). “Cumulative Sum Charts,” Technometrics, 3, 1-9.


Shewhart, W. A. (1931). Economic Control of Quality of Manufacturing Product, Princeton, NJ, Van Nostrand Reinhold.


Tiao, G. et al., Eds. (2000). Box on Quality and Discovery with Design, Control, and Robustness, New York, John Wiley & Sons.

Exercises


12.1 Diagnosing Upsets. Presented in the chapter are eight simple rules for defining an “unusual occurrence.” Use the rules to examine the data in the accompanying chart. The average level is 24 and a = 1.


40


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Ji 30



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20


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0    10    20    30    40    50    60


Observation


12.2 Charting. Use the first 20 duplicate observations in the data set below to construct Shewhart, Range, and Cusum charts. Plot the next ten observations and decide whether the process has remained in control. Compare the purpose and performance of the three charts.

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