condition mean min max ZT0-3 127.616672 127.616672 127.616672 ZT4-7 133.346025 133.346025 133.346025 ZT8-11 133.559465 133.559465 133.559465 ZT12-15 179.3672505 179.3672505 179.3672505 ZT16-19 138.9077165 138.9077165 138.9077165 ZT20-23 122.897105 122.897105 122.897105