Month: December 2021

OPTIONS Introduced a Dummy Variable Introduced a Center Point Coded the Factors Set levels for the factors ANSWER Coded the Factors EXPLANATION When scales are changed to -1 and +1, coding happens.

OPTIONS Full factorial design Nested Design Crossed Design Balanced Design ANSWER Balanced Design EXPLANATION A Balanced Design always has the same number of observations.

OPTIONS DOE ANOVA Homogeneity of Variances Setting up Control Limits ANSWER ANOVA EXPLANATION ANOVA always separates variability of a group of observations into assignable causes thus anova is correct.

OPTIONS Interactions are tested, but the results are available for main effects only Interactions get aliased with main effects All main effects are considered significant All interactions are considered insignificant ANSWER Interactions are tested, but the results are available for main effects only EXPLANATION In...

i. Third order interactions are aliased ii. Second order interactions are aliased iii. The fourth order term could be the Design Generator iv. All main effects are significant OPTIONS i and ii i, ii and iii i and iii i, ii, iii and iv ANSWER...

OPTIONS Replication Randomization Blocking None of the above ANSWER Randomization EXPLANATION Randomization always happens by default with special computer packages so Randomization is correct.

OPTIONS 8 16 12 None of the above ANSWER None of the above EXPLANATION For a 3 factor 2 level experiment, 1/4th fractional factorial design can be made.

OPTIONS 20 5 25 15 ANSWER 25 EXPLANATION Mean Squares of treatments is sum squares of treatments/number of treatments -1, thus 25 is correct.

OPTIONS 0.5 1 1.5 2 ANSWER 1.5 EXPLANATION Using the convention formula for arriving at main effects, 1.5 is correct.

A Black Belt conducts a designed experimental setup on his factors. While conducting the experiment, he finds that some main effects are aliased with 2nd order and 3rd order interaction. Which type of experiment did he conduct? OPTIONS Screening experiment Fractional Factorial Design Full Factorial...