condition mean min max ZT0-3 370.5016 370.5016 370.5016 ZT4-7 232.514227 232.514227 232.514227 ZT8-11 172.5886515 172.5886515 172.5886515 ZT12-15 166.581896 166.581896 166.581896 ZT16-19 155.84968650000002 155.84968650000002 155.84968650000002 ZT20-23 124.34255399999999 124.34255399999999 124.34255399999999