condition mean min max ZT0-3 164.72333333333333 143.822 189.4495 ZT4-7 82.7302 82.7302 82.7302 ZT8-11 16.9734 16.9734 16.9734 ZT12-15 16.703787499999997 8.989625 24.417949999999998 ZT16-19 11.771799999999999 11.771799999999999 11.771799999999999 ZT20-23 64.845 64.845 64.845