The article Statistical Design and Analysis of
Chapter 11, Problem 11.43(choose chapter or problem)
The article Statistical Design and Analysis of Qualification Test Program for a Small Rocket Engine (Industrial Quality Control, 1964: 1418) presents data from an experiment to assess the effects of vibration (A), temperature cycling (B), altitude cycling (C), and temperature for altitude cycling and firing (D) on thrust duration. A subset of the data is given here. (In the article, there were four levels of D rather than just two.) Use the Yates method to obtain sums of squares and the ANOVA table. Then assume that three- and four-factor interactions are absent, pool the corresponding sums of squares to obtain an estimate of 2 , and test all appropriate hypotheses at level .05. D1 D2 | C1 C2 C1 C2 A1 B1 | 21.60 21.60 11.54 11.50 B2 | 21.09 22.17 11.14 11.32 A2 B1 | 21.60 21.86 11.75 9.82 B2 | 19.57 21.85 11.69 11.18
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