Question 9.13: The design suggested in Example 9. 12 has been adopted, and ...

Principles of Statistics for Engineers and Scientists

The design suggested in Example 9. 12 has been adopted, and the experiment has been carried out. The results (from MTNITAB) follow. Does the output indicate any violation of necessary assumptions? What do you conclude regarding the effect of drill speed on excess diameter?

Two-way ANOVA: Excess Diameter versus Block, Speed

\begin{array}{lrrrrr}\text{Source}& \text{DF}& \text{SS}& \text{MS}& F & P \\\text{BTock}& 5 & 0.20156 & 0.0403117 & 1.08 & 0.404 \\\text{Speed}& 2 & 0.07835 & 0.0391750 & 1.05 & 0.370 \\\text{Interaction}& 10 & 0.16272 & 0.0162717 & 0.44 & 0.909 \\\text{Error}& 18 & 0.67105 & 0.0372806 & & \\\text{Tota1}& 35 & 1.11368 & & &\end{array}

S = 0.1931 R-Sq = 39 .74% R-Sq(adj) = 0 .00%

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