Statistics Spotlight
2013
Statistics Roundtable: Providing Better Insights
In an earlier Statistics Roundtable column, we advocated for the use of degradation testing (that is, monitoring change in a quality or performance characteristic) instead of time to failure....
Statistics Roundtable: Balancing Priorities
We live in a complex world in which getting exactly what we want is often difficult or impossible. The notion of a trade-off is something we are forced to confront almost daily....
Statistics Roundtable: Wanderlust and Memory
Pop quiz. Question one: How do you derive Shewhart (X-bar and R, or X-bar and S) control chart limits?...
Statistics Roundtable: One Size Does Not Fit All
The need to improve is ever present in all endeavors and will continue to be so. We live in a dynamic world. As predicted in the second law of thermodynamic and entropy, the world will continue to change....
Statistics Roundtable: Getting Graphical
A company has six manufacturing processes critical to its business success. Management recently required each area manager to provide quarterly reports on the performance of their particular process....
Statistics Roundtable: Let's Be Realistic
Decision making is all about understanding and comparing trade-offs between choices: What benefits are possible, what are the risks and can they be mitigated, and what will each of the alternatives cost?...
Statistics Roundtable: Group Effort
Cluster analysis is being widely used in disciplines as diverse as marketing, genomics and climate change. The technique lends itself to large data sets and small, focused data sets....
Statistics Roundtable: Follow the Rules
Despite appearances to the contrary, I am not old enough to have participated in the first discussions of control chart rules....
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