Chapter 7. Correlation Tests
What you will learn in this chapter is how to discover the key process input variables (KPIVs) that may have caused a change in a process or product. For that, we will be doing correlation tests. In some Six Sigma classes, regression analysis is used to find correlations. A mathematical curve is fit to a set of data and techniques are used to measure how well the data fit these curves. The curves are then used to test for correlations.
These methods require a high degree of skill and generally are not friendly to those who are not doing this kind of analysis almost daily. Thankfully, most Six Sigma work can be done using the tools already covered, as long as we are willing to do some visual examination of data and ...
Get Statistics for Six Sigma Made Easy now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
