condition mean min max ZT0-3 3271.35 3271.35 3271.35 ZT4-7 3061.0 3061.0 3061.0 ZT8-11 2785.45 2785.45 2785.45 ZT12-15 2828.75 2828.75 2828.75 ZT16-19 3311.2 3311.2 3311.2 ZT20-23 3410.55 3410.55 3410.55