condition mean min max ZT0-3 0.5796045 0.5796045 0.5796045 ZT4-7 0.8301379999999999 0.8301379999999999 0.8301379999999999 ZT8-11 1.0457135000000002 1.0457135000000002 1.0457135000000002 ZT12-15 0.753834 0.753834 0.753834 ZT16-19 1.8104649999999998 1.8104649999999998 1.8104649999999998 ZT20-23 0.73828 0.73828 0.73828