Thursday, August 20, 2015

Substantiation Test Hypothesis test provides unbiased, statistics-based solutions

by Joseph Paul Mitchell

Hypothesis testing is one of many Six Sigma tools and techniques used for process improvement. Recently, it was part of a manufacturer’s define, measure, analyze, improve and control (DMAIC) investigation concerning a suspected variance of mechanical properties in steel tubing. In this case, the product’s population standard deviation was unknown, and consequently, a two-sample t-test was used.

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