Statistics for Six Sigma Green Belts with Minitab and JMP

Introduction

In Chapter 6, “Sampling Distributions and Confidence Intervals,” the concept of a sampling distribution was developed, and confidence intervals were used to estimate population parameters. This chapter focuses on making inferences about the hypothesized values of two or more population parameters using sample statistics and hypothesis testing procedures. The variable of interest is the CTQ, and the populations of interest are the different levels of a CTP (X). For example, the CTQ could be the order fulfillment times at a web site, and the populations of interest might be the different ways of filling the orders. These methods are referred to as hypothesis testing or tests of statistical significance. These procedures are used for ...