8.2. Two-Factor Factorial Designs

This section begins the study of experimental designs in which more than one factor (X) is examined simultaneously. These experimental designs are called factorial designs because they simultaneously evaluate the effects of two or more factors (Xs). This section discusses the simplest factorial design: the two-factor design. In addition, although you can include any number of levels of a factor in a design, for pedagogical simplicity, only the special circumstance in which there are two levels (or treatments) for each factor of interest (CTP or X) will be considered in this book. Designs that contain more than two levels of a factor are logical extensions of the two-level case. In addition, this text only considers ...

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