condition mean min max ZT0-3 1498.7 1498.7 1498.7 ZT4-7 1373.1 1373.1 1373.1 ZT8-11 1406.5500000000002 1406.5500000000002 1406.5500000000002 ZT12-15 1734.9499999999998 1734.9499999999998 1734.9499999999998 ZT16-19 1760.0 1760.0 1760.0 ZT20-23 1541.65 1541.65 1541.65