In this post I will derive a simple relationship between process shift and the capability indices Cp and Cpk.
In this post I describe an approach that I use to teach statistics. The goal is to use JMP to help develop an intuitive understanding of some common concepts: hypothesis testing, p-values and reference distributions.
Quality control techniques such are control charts and Gage R&R studies sometimes feel as if they are stuck in the pre-computer age. For example they typically use range as a measure of dispersion since it is far easier to calculate than a standard deviation.(more…)
Statistics is not about conforming to some strange protocol that we neither agree with nor like.
Here is a data table that I have created. It happens to contain data
that is the result of a designed experiment. I know that, but JMP doesn’t.