condition mean min max ZT0-3 604.5 604.5 604.5 ZT4-7 173.5 173.5 173.5 ZT8-11 187.6 187.6 187.6 ZT12-15 303.75 303.75 303.75 ZT16-19 438.04999999999995 438.04999999999995 438.04999999999995 ZT20-23 635.55 635.55 635.55