The Foundation of Statistical Control Charts
Some of the basics behind the control chart.
Single Indicator Numbers
Using single indicators to measure complex systems is a foolhardy venture.
Drug arrests
The following data came from the DEA (Drug Enforcement Administration) and is a plot of U. S. Domestic Arests from 1986 to the present. Interesting bump in the middle of the graph….data always begets questions. People look to data for anwers and often find only more questions. This is good because at every level understanding [...]
