condition mean min max ZT0-3 529.9 529.9 529.9 ZT4-7 1035.0 1035.0 1035.0 ZT8-11 902.6 902.6 902.6 ZT12-15 822.25 822.25 822.25 ZT16-19 505.40000000000003 505.40000000000003 505.40000000000003 ZT20-23 585.2 585.2 585.2