An evaluation of diffusion bonding of zircaloy components is performed. The main objective is to determine which of three elements—nickel, iron, or copper— is the best bonding agent. A series of zircaloy components are bonded using each of the possible bonding agents. Since there is a great deal of variation in components machined from different ingots, a randomized block design is used, blocking on the ingots. A pair of components from each ingot are bonded together using each of the three agents, and the pressure (in units of 1,000 pounds per square inch) required to separate the bonded components is measured. The data are shown in the accompanying table, followed by a partial ANOVA summary table.

a. Identify the treatments in this experiment.

b. Identify the blocks in this experiment.

c. Is there evidence of a difference in pressure required to separate the components among the three bonding agents? Use α = .05.

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INGOT2 Bonding Agent Ingot Nickel Iron сорper 1 67.0 71.9 72.2 2 67.5 68.8 66.4 3 76.0 82.6 74.5 4 72.7 78.1 67.3 5 73.1 74.2 73.2 65.8 70.8 68.7 75.6 84.9 69.0 Source df MS F Agent Ingot 131.90 268.29 Error 12 124.46 Total 20 524.65 LL 2.