condition mean min max ZT0-3 58.8 58.8 58.8 ZT4-7 41.7 41.7 41.7 ZT8-11 40.15 40.15 40.15 ZT12-15 52.8 52.8 52.8 ZT16-19 39.95 39.95 39.95 ZT20-23 32.45 32.45 32.45