condition mean min max ZT0-3 1.0488324859999998 0.52338551 1.5742794619999998 ZT4-7 0.3896396785 0.14612320199999998 0.633156155 ZT8-11 0.9158921975000001 0.803242182 1.0285422130000001 ZT12-15 0.14237839625 0.0755262385 0.209230554 ZT16-19 0.32807762149999997 0.121744684 0.5344105589999999 ZT20-23 0.165012214 0.0688877715 0.2611366565