condition mean min max ZT0-3 1528.9 1528.9 1528.9 ZT4-7 1198.4 1198.4 1198.4 ZT8-11 1106.6 1106.6 1106.6 ZT12-15 1212.1999999999998 1212.1999999999998 1212.1999999999998 ZT16-19 1256.6 1256.6 1256.6 ZT20-23 1471.05 1471.05 1471.05