Question

7:42 PM Wed Oct 10 Design and Analysis of Experiments, 9th Edition Generally, the engineering units are not directly comparable, but they may have physical meaning as in the present example. This could lead to possible simpification based on the underlying almost all situations, the coded unit analysis is preferable. It is fairly unusual for a simplification based on some underlying mechanism (as in our example) to oocur. The fact that coded variables let an experimenter see the relative importance of the design factors is useful in practice 6.10 Problems 6.1 In a 24 factorial design, the number of degrees of freedom for the model, assuming the complete factorial model, is b. 5 c. 6 e. 12 f. none of the above 62 A23factorial is replicated twice. The number of pure error or residual degrees of freedom are b. 12 c. 15 d. 2 f, none of the above 6.3 A 23 factorial is replicated twice. The ANOVA indicates that all main effects are signiicant but the interactions are not significant. The interaction terms are dropped from the model. The number of residual degrees of freedom for the reduced model are a. 12 b. 8 c 16 d. 14 f, none of the above 64 A 2 factorial is replicated three times. The ANOVA indicates that all main effects are signisicant but two of the interactions are not significant. The interaction terms are dropped trom the model. The number of residual degrees of freedom for the reduced model are a. 12 b. 14 c. 6 d. 10 0. 8 f, none of the above

Answer 1