condition mean min max ZT0-3 141.65391666666667 77.25475 194.7505 ZT4-7 41.0184 41.0184 41.0184 ZT8-11 27.977800000000002 27.977800000000002 27.977800000000002 ZT12-15 73.6181 70.095 77.1412 ZT16-19 82.7986 82.7986 82.7986 ZT20-23 147.1525 147.1525 147.1525