condition mean min max ZT0-3 96.10000000000001 96.10000000000001 96.10000000000001 ZT4-7 24.7 24.7 24.7 ZT8-11 17.700000000000003 17.700000000000003 17.700000000000003 ZT12-15 35.0 35.0 35.0 ZT16-19 81.05000000000001 81.05000000000001 81.05000000000001 ZT20-23 58.699999999999996 58.699999999999996 58.699999999999996