condition mean min max ZT0-3 91.0979 80.29745 100.04974999999999 ZT4-7 77.6106 77.6106 77.6106 ZT8-11 57.751900000000006 57.751900000000006 57.751900000000006 ZT12-15 51.52185 47.210300000000004 55.8334 ZT16-19 60.3564 60.3564 60.3564 ZT20-23 60.122299999999996 60.122299999999996 60.122299999999996