condition mean min max ZT0-3 159.924192 159.924192 159.924192 ZT4-7 173.6586495 173.6586495 173.6586495 ZT8-11 186.8474415 186.8474415 186.8474415 ZT12-15 185.9072865 185.9072865 185.9072865 ZT16-19 208.0258825 208.0258825 208.0258825 ZT20-23 175.7819825 175.7819825 175.7819825