condition mean min max ZT0-3 68.65365 68.65365 68.65365 ZT4-7 56.7732 56.7732 56.7732 ZT8-11 40.86685 40.86685 40.86685 ZT12-15 44.2619 44.2619 44.2619 ZT16-19 58.0697 58.0697 58.0697 ZT20-23 65.8295 65.8295 65.8295