Aircraft primer paints are applied to aluminum surfaces to improve paint adhesion. Primerscan be applied by two methods: dipping and spraying, and some parts can be primed usingeither application method. The process engineering group responsible for this operationdesigned/performed a factorial experiment to investigate the effect of paint primer type andapplication method on paint adhesion. For each combination of primer type and applicationmethod, three specimens were painted, then a finish paint was applied and the adhesionforce was measured in MPa. The data from the experiment are shown in the following table.Do primer type, application method, and their interactions significantly impact adhesion, at5% significance level? Overall Mean = 5Primer TypeApplication Method X Y ZDipping 5.5 4.5 3.55.5 4.5 46 4 3Spraying 6.5 5 47 5.5 57 5 4.5
Aircraft primer paints are applied to aluminum surfaces to improve paint adhesion. Primers
can be applied by two methods: dipping and spraying, and some parts can be primed using
either application method. The process engineering group responsible for this operation
designed/performed a factorial experiment to investigate the effect of paint primer type and
application method on paint adhesion. For each combination of primer type and application
method, three specimens were painted, then a finish paint was applied and the adhesion
force was measured in MPa. The data from the experiment are shown in the following table.
Do primer type, application method, and their interactions significantly impact adhesion, at
5% significance level?
Overall Mean = 5
Primer Type
Application Method X Y Z
Dipping 5.5 4.5 3.5
5.5 4.5 4
6 4 3
Spraying 6.5 5 4
7 5.5 5
7 5 4.5
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