condition mean min max ZT0-3 141.39999999999998 141.39999999999998 141.39999999999998 ZT4-7 303.1 303.1 303.1 ZT8-11 395.0 395.0 395.0 ZT12-15 334.45 334.45 334.45 ZT16-19 231.2 231.2 231.2 ZT20-23 164.85 164.85 164.85