• Articles Archive

Some Misconceptions about Confidence Intervals

This article discusses three misconceptions regarding the use of confidence intervals. Keith M. Bower, Six Sigma Forum - American Society for Quality, July 2003

Why We Don't Accept the Null Hypothesis

This article discusses a frequently encountered mistake when using hypothesis tests. Keith M. Bower and James A. Colton, Six Sigma Forum - American Society for Quality, July 2003

The Two-Sample T-Test and Randomization Test

In this article, the author investigates situations in which the two-sample t-test may be considered robust to certain assumptions, including normality. Illustrates the randomization test procedure using a hypothetical example. Keith M. Bower, Six Sigma Forum - American Society for Quality, June 2003

Some Misconceptions about the Normal Distribution

This article discusses three misconceptions regarding the use of the normal distribution in theory and practice. Keith M. Bower, Six Sigma Forum - American Society for Quality, May 2003

Measurement System Analysis and Destructive Testing

This article explores the use of a nested design in a measurement system analysis with destructive testing. Includes a discussion of model assumptions and examines results from a practical example. Douglas Gorman and Keith M. Bower, ASQ Six Sigma Forum Magazine, August 2002, Vol. 1, No. 4

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