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Aluminum aircraft parts are always subject to possible corrosion. To prevent corrosion an anodizing solution is often recommended for use on the parts. Engineers are considering two different solution types and two application methods. An experiment was conducted in which sample parts were tested in a factorial experiment. The results of the experiment follow:
Application Method
Solution Type
Dip
Spray
1
4.0, 4.5, 4.3
5.4, 4.9, 5.6
2
3.8, 3.7, 4.0
5.8, 6.1, 6.3
a. Analyze the data from this experiment (Minitab and JMP can analyze data from factorial designs).
b. Are the basic analysis of variance assumptions satisfied in this experiment?
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