condition mean min max ZT0-3 77.692878 77.692878 77.692878 ZT4-7 46.508598 46.508598 46.508598 ZT8-11 42.6136425 42.6136425 42.6136425 ZT12-15 39.8520635 39.8520635 39.8520635 ZT16-19 24.1500135 24.1500135 24.1500135 ZT20-23 26.412754500000002 26.412754500000002 26.412754500000002