The second edition of this book provides a conceptual understanding of analysis of variance. It outlines methods for analysing variance that are used to study the effect of one or more nominal variables on a dependent, interval level variable. The book presumes only elementary background in significance testing and data analysis.



We entered into the discussion of the method known as analysis of variance (ANOVA) by way of a substantive question. The question dealt with the effect the mass media may have on the public's concern with the economy. Let us now review to what extent ANOVA has helped us answer that basic question. ...

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