Rework Problem 13-22, assuming that the technicians are chosen at random. Use the restricted form of the mixed model.

Problem 13-22

Consider the split-split-plot design described in Example 13-3. Suppose that this experiment is conducted as described and that the data shown in the following table are obtained. Analyze the data and draw conclusions.

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Technician 1 2 3 Replicates (or Blocks) Dosage Strengths 1 1 3 1 3 Wall Thickness 1 95 71 108 96 70 108 95 70 100 1 104 82 115 99 84 100 102 81 106 101 85 117 95 83 105 105 84 113 4 108 85 116 97 85 109 107 87 115 1 95 78 110 100 72 104 92 69 101 2 2 106 84 109 101 79 102 100 76 104 3 103 86 116 99 80 108 101 80 109 4 109 84 110 112 86 109 108 86 113 1 96 70 107 94 66 100 90 73 98 2 105 81 106 100 84 101 97 75 100 3 106 88 112 104 87 109 100 82 104 4 113 90 117 121 90 117 110 91 112 1 90 68 109 98 68 106 98 72 101 2 100 84 112 102 81 103 102 78 105 3 102 85 115 100 85 110 105 80 110 4 114 88 118 118 85 116 110 95 120 3. 2. 434 3. 4.