condition mean min max ZT0-3 49.5239 49.5239 49.5239 ZT4-7 104.7195 104.7195 104.7195 ZT8-11 30.874850000000002 30.874850000000002 30.874850000000002 ZT12-15 2.74564 2.74564 2.74564 ZT16-19 2.55709 2.55709 2.55709 ZT20-23 6.802685 6.802685 6.802685