Two parts will be fastened together with an adhesive. The adhesive will be applied to each part, and then the parts will be pressed together. Two types of adhesive are available. The amount of pressure applied can be either high or low. An experiment is run in which three sets of parts are glued together with each combination of adhesive and pressure. The strengths of the bond (in megapascals) are measured, with the following results.

a. Can you reject the hypothesis of no interactions? Explain.

b. Can the main effect of adhesive on the strength be interpreted? If so, interpret the main effect, using the α = 0.05 level of significance.
If not, explain why not.

c. Can the main effect of pressure on the strength be interpreted? If so, interpret the main effect, using the α = 0.05 level of significance. If not, explain why not.

Transcribed Image Text:

Adhesive A High Pressure 897 Low Pressure 132 Adhesive B 332 5 4 4