condition mean min max ZT0-3 1707.317823 1707.317823 1707.317823 ZT4-7 925.8170729999999 925.8170729999999 925.8170729999999 ZT8-11 1013.475411 1013.475411 1013.475411 ZT12-15 1438.459132 1438.459132 1438.459132 ZT16-19 1772.6167955 1772.6167955 1772.6167955 ZT20-23 1904.34752 1904.34752 1904.34752