condition mean min max ZT0-3 0.7722709999999999 0.7722709999999999 0.7722709999999999 ZT4-7 0.568211 0.568211 0.568211 ZT8-11 1.43459 1.43459 1.43459 ZT12-15 1.5564 1.5564 1.5564 ZT16-19 2.429645 2.429645 2.429645 ZT20-23 0.8668279999999999 0.8668279999999999 0.8668279999999999