condition mean min max ZT0-3 86.8402 45.08585 117.00049999999999 ZT4-7 28.369999999999997 28.369999999999997 28.369999999999997 ZT8-11 37.13185 37.13185 37.13185 ZT12-15 66.13635 59.7063 72.5664 ZT16-19 93.16775000000001 93.16775000000001 93.16775000000001 ZT20-23 149.5085 149.5085 149.5085