condition mean min max ZT0-3 71.983645 71.983645 71.983645 ZT4-7 23.799553500000002 23.799553500000002 23.799553500000002 ZT8-11 53.1285015 53.1285015 53.1285015 ZT12-15 74.8384405 74.8384405 74.8384405 ZT16-19 132.7476645 132.7476645 132.7476645 ZT20-23 183.7918095 183.7918095 183.7918095