condition mean min max ZT0-3 1393.0 1393.0 1393.0 ZT4-7 1091.2 1091.2 1091.2 ZT8-11 1227.9 1227.9 1227.9 ZT12-15 1891.0 1891.0 1891.0 ZT16-19 1750.4499999999998 1750.4499999999998 1750.4499999999998 ZT20-23 1471.0500000000002 1471.0500000000002 1471.0500000000002