condition mean min max ZT0-3 2279.0 2279.0 2279.0 ZT4-7 2619.5 2619.5 2619.5 ZT8-11 3118.2 3118.2 3118.2 ZT12-15 1971.95 1971.95 1971.95 ZT16-19 2327.85 2327.85 2327.85 ZT20-23 3627.7000000000003 3627.7000000000003 3627.7000000000003