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Managing and Improving Quality by Amar Sahay

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CHAPTER 3

Statistical Methods Used in Quality

Introduction

This chapter provides an overview of statistical methods used in quality improvement. We will discuss a number of simple to complex statistical techniques that are used in modeling, studying, and solving quality problems. Since variation reduction is one of the major objectives of quality improvement programs, the emphasis in this chapter is to introduce the graphical and numerical tools of descriptive statistics that are used to study the variation in process data. The other objective of this chapter is to get insight into several of the discrete and continuous probability distributions and their properties. A good knowledge and understanding of probability distributions is critical ...

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