
Analysis of Variance and Experimental Designs
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Chapter 12
PB
An experimental design is the logical construction of the
experiment to test hypotheses in which researcher either con-
trols or manipulates one or more variables. Analysis of variance
or ANOVA is a technique of testing a hypothesis about the sig-
nifi cant difference in several population means. In analysis of
variance (one-way classifi cation), the total variation in the sam-
ple data can be divided into two components, namely variance
between the samples and variance within the samples. Variance
between the samples is attributed to the difference among the
sample means. This variance ...