condition mean min max ZT0-3 73.7285 51.79845 88.41749999999999 ZT4-7 49.0113 49.0113 49.0113 ZT8-11 77.6337 77.6337 77.6337 ZT12-15 165.71925 138.2 193.2385 ZT16-19 139.6175 139.6175 139.6175 ZT20-23 125.749 125.749 125.749