Statistics for Environmental Engineers

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Experimental Design


The design matrix lists the setting of each factor in a standard order. Table 27.2 contains the design matrix for a full factorial design with к = 3 factors at two levels and a к = 4 factor design. The three-factor design uses 23 = 8 experimental runs to investigate three factors. The 24 design uses 16 runs to investigate four factors. Note the efficiency: only 8 runs to investigate three factors, or 16 runs to investigate four factors.

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