condition mean min max ZT0-3 234.3 234.3 234.3 ZT4-7 178.1 178.1 178.1 ZT8-11 397.95000000000005 397.95000000000005 397.95000000000005 ZT12-15 422.25 422.25 422.25 ZT16-19 292.55 292.55 292.55 ZT20-23 172.5 172.5 172.5