condition mean min max ZT0-3 695.5999999999999 695.5999999999999 695.5999999999999 ZT4-7 1014.9 1014.9 1014.9 ZT8-11 754.55 754.55 754.55 ZT12-15 731.55 731.55 731.55 ZT16-19 731.05 731.05 731.05 ZT20-23 621.7 621.7 621.7