Consider the experiment in Exercise 7-2. Suppose that the experiment was actually carried out on three types of drying times and two types of paint. The data are the following:

(a) Perform the analysis of variance with 0.05. What is your conclusion about the significance of the interaction effect?

(b) Assess the adequacy of the model by analyzing the residuals.
What is your conclusion?

(c) If the smaller values are desirable, what levels of the factors do you recommend to obtain the necessary surface finish?

Transcribed Image Text:

Paint 20 Drying Time (min) 25 30 1 74 73 78 64 61 85 50 44 92