... that successful data analysis, whether quantitative or qualitative, requires(1) understanding a variety of data analysis methods,(2) planning data analysis early in a project andmaking revisions ... Mosteller, and Tukey, 1983,1985; Velleman and Hoaglin, 1981; and Hartwig andDearing, 1979.)Fit the analysis methods to the study question and the data in hand. The appropriateness of an analysismethod ... good answers to causal questions may beobtained.The usual ways to analyze experimental data are withtechniques such as analysis of variance (ANOVA),analysis of covariance (ANCOVA), and regression.Regression...