One-Way Analysis of Variance
In Chapter 5 we consider ways to compare the means of two populations. Now we extend these procedures to comparisons of means from several populations. For example, we may wish to compare the average hourly production of a company’s six factories. We say that the investigation has a factor factory that has six levels, namely the six identifiers distinguishing the factories from one another. Or we may wish to compare the yields per acre of five different varieties of wheat. Here, the factor is wheat, and the levels of wheat are variety1 through variety5. This chapter discusses investigations having a single factor. Experiments having two factors are discussed in Chapter 12, while situations with two or more factors are discussed in Chapters 13 and 14.
KeywordsANOVA Table Variance Table Tukey Method Simultaneous Confidence Interval Experimentwise Error Rate
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