| N | Min | Max | Range | Mean | Var | Std | CV(%) |
251-10 | 50 | 18.75 | 47.68 | 28.93 | 27.37 | 72.55713 | 8.518048 | 31.09244 |
251-12 | 50 | 10.65 | 33.91 | 23.26 | 23.09583 | 74.72084 | 8.644122 | 37.42802 |
251-14 | 50 | 6.6 | 35.01 | 28.41 | 18.18878 | 48.25897 | 6.946867 | 38.19314 |
251-16 | 50 | 6.43 | 39.68 | 33.25 | 21.84191 | 59.46349 | 7.711257 | 35.30369 |
251-18 | 50 | 4.89 | 58.64 | 53.75 | 19.38042 | 86.21478 | 9.285192 | 47.91017 |