condition mean min max ZT0-3 884.7 884.7 884.7 ZT4-7 1042.9 1042.9 1042.9 ZT8-11 1351.1 1351.1 1351.1 ZT12-15 2287.7 2287.7 2287.7 ZT16-19 1683.6999999999998 1683.6999999999998 1683.6999999999998 ZT20-23 927.55 927.55 927.55