EXAM 3 Review Problems For each problem, you will have to determine the design. Your design choices are Randomized Block Split Plot, Split Plot, ANCOVA, Crossover, Repeated Measures, Nested Design, Latin Square, Random Effects, Fixed Effects, and Mixed Effects (in that order). So if it is a Nested design with fixed treatments, you will answer Nested Design, not Fixed Effects

4. Essentially the question that we want to answer is, "Is the purity of the material the same across suppliers?" Four suppliers are investigated. Four batches at random from each of four suppliers are selected. Make three purity determinations from each batch.