condition mean min max ZT0-3 20.737099999999998 13.0549 27.95355 ZT4-7 17.77145 17.77145 17.77145 ZT8-11 14.7347 14.7347 14.7347 ZT12-15 14.5533025 11.747905 17.3587 ZT16-19 12.2166 12.2166 12.2166 ZT20-23 33.5218 33.5218 33.5218