| N | Min | Max | Range | Mean | Var | Std | CV(%) |
251-10 | 50 | 77 | 109 | 32 | 91.33333 | 34.09195 | 5.838832 | 6.392204 |
251-12 | 50 | 87 | 93 | 6 | 89.5 | 3.727273 | 1.930615 | 2.156425 |
251-14 | 50 | 75 | 104 | 29 | 91.38095 | 75.9489 | 8.714866 | 9.531527 |
251-16 | 50 | 69 | 97 | 28 | 86.41304 | 44.29227 | 6.655244 | 7.701666 |
251-18 | 50 | 63 | 102 | 39 | 83.92593 | 91.01328 | 9.540088 | 11.36727 |