condition mean min max ZT0-3 1414.4499999999998 1414.4499999999998 1414.4499999999998 ZT4-7 1503.6 1503.6 1503.6 ZT8-11 1938.6 1938.6 1938.6 ZT12-15 2412.3 2412.3 2412.3 ZT16-19 2185.5 2185.5 2185.5 ZT20-23 1794.85 1794.85 1794.85