A factorial experiment was completed to determine the tensile strength of a fiber-reinforced epoxy composite. Three factors were of interest: fiber volume fraction (3 levels), curing time (2 levels), and compression force (3 levels) during fabrication of the composite. No repeats were completed. Table 1 lists the results. Complete your answers for 95% confidence.

a. Complete an ANOVA and table 2. Use the "sources" listed in table 2 for your ANOVA.

b. Determine the Ftable value for these conditions and complete table 3.

c. State your conclusions. In particular, state which if any of the factors are significant relative to influencing the tensile strength of the composite.

d. Redo your ANOVA with the addition of the term "ABC." Describe why these results are different than part "a." What would you recommend so that you could determine all terms in this part?