condition mean min max ZT0-3 367.55 367.55 367.55 ZT4-7 327.1 327.1 327.1 ZT8-11 287.15 287.15 287.15 ZT12-15 1138.65 1138.65 1138.65 ZT16-19 1247.5 1247.5 1247.5 ZT20-23 471.45 471.45 471.45