condition mean min max ZT0-3 1196.1 1196.1 1196.1 ZT4-7 1414.1 1414.1 1414.1 ZT8-11 1637.6999999999998 1637.6999999999998 1637.6999999999998 ZT12-15 1398.95 1398.95 1398.95 ZT16-19 1393.8 1393.8 1393.8 ZT20-23 1390.85 1390.85 1390.85