*7. Thirty prospective teachers take a standards-based teacher competency test. The results are as follows (each score reflects the percentage of standards for which the prospective teacher demonstrates proficiency):

81 91 89 81 79 82 70 92 80 64 73 86 87 72 74 75 90 85 83 82 79 82 78 96 77 85 83 87 88 80 Because the range of these 30 scores is 96  64 ¼ 32, the plausible values of i are 2 or 3.