The effect of curing pressure on bond strength (in MPa) was tested for two different adhesives. There were three levels of curing pressure. Three replications were performed for each combination of curing pressure and adhesive. The results are presented in the following table.
Adhesive Curing Pressure Bond Strength
A Low 8.9 9.6 7.1
A Medium 7.2 7.0 8.7
A High 1.1 4.7 0.2
B Low 4.3 5.2 2.9
B Medium 2.3 4.6 5.0
B High 5.9 2.2 4.6
(a) Test the appropriate hypotheses and draw conclusions using = 0.05.
(b) Graphically analyze the interaction.