To see whether thrust force in drilling is affected by drilling speed (A), feed rate (B), or material used (C), an experiment using four speeds, three rates, and two materials was performed, with two samples drilled at each combination of levels of the three factors. Sums of squares were calculated as follows:

238.21, 819.50, and SST 5 2,983,164.81. Construct the ANOVA SSAC 5 9033.73, SSBC 5 91,880.04, SSE 5 56, SSB 5 2,589,047.62, SSC 5 157,437.52, SSAB 5 53, SSA 5 19,149.73,

table and identify significant interactions using . Is there any single factor that appears to have no effect on thrust force? (In other words, does any factor appear nonsignificant in every effect in which it appears?)