Reassessing GDP Growth with Data and Statistics, Part 2Understanding the IM-R chart
Thu, 01/26/2012 - 12:00
This is part two in a three-part series where we assess what information we can obtain from the various estimates of quarterly GDP growth using statistical analysis and a control chart. Read part one here, and part three here.
An I-MR chart… Controlling Variability Is More Difficult Than Controlling MeanA case study of jumping teenagers
Fri, 12/02/2011 - 15:01
In a recent blog post, “Assessing Variability for Quality Improvement,” I showed how measuring variability is as important as measuring the mean for a product or service in a quality improvement initiative. The mean, by itself, often tells an…
