condition mean min max ZT0-3 0.6394728333333334 0.5763229999999999 0.7106330000000001 ZT4-7 0.7040470000000001 0.7040470000000001 0.7040470000000001 ZT8-11 1.813285 1.813285 1.813285 ZT12-15 2.0051775000000003 1.594025 2.4163300000000003 ZT16-19 1.089332 1.089332 1.089332 ZT20-23 0.858657 0.858657 0.858657