condition mean min max ZT0-3 1515.2 1515.2 1515.2 ZT4-7 624.6 624.6 624.6 ZT8-11 1338.0 1338.0 1338.0 ZT12-15 894.25 894.25 894.25 ZT16-19 1039.75 1039.75 1039.75 ZT20-23 1741.8500000000001 1741.8500000000001 1741.8500000000001