condition mean min max ZT0-3 524.0 524.0 524.0 ZT4-7 249.1 249.1 249.1 ZT8-11 419.04999999999995 419.04999999999995 419.04999999999995 ZT12-15 593.15 593.15 593.15 ZT16-19 853.2 853.2 853.2 ZT20-23 691.8 691.8 691.8