condition mean min max ZT0-3 41.35 41.35 41.35 ZT4-7 28.5 28.5 28.5 ZT8-11 250.14999999999998 250.14999999999998 250.14999999999998 ZT12-15 3618.75 3618.75 3618.75 ZT16-19 4158.1 4158.1 4158.1 ZT20-23 126.9 126.9 126.9