Reanalyze the experiment in Problem 13-5 using the unrestricted form of the mixed model. Comment on any differences you observe between the restricted and the unrestricted model results. You may use a computer software package.

Problem 13-5

Consider the three-stage nested design shown in Figure 13-5 to investigate alloy hardness. Using the data that follow, analyze the design, assuming that alloy chemistry and heats are fixed factors and ingots are random. Use the restricted form of the mixed model.

 

Figure 13-5

Transcribed Image Text:

Alloy Chemistry Heats 1 2 1 3 1 Ingots 1 1 2 1 2 1 2 1 2 40 27 95 69 65 78 22 23 83 75 61 35 63 30 67 47 54 45 10 39 62 64 77 42