condition mean min max ZT0-3 0.45488566666666663 0.0971625 0.784515 ZT4-7 1.0967855 1.0967855 1.0967855 ZT8-11 2.345435 2.345435 2.345435 ZT12-15 4.0611725 3.043985 5.07836 ZT16-19 1.95446 1.95446 1.95446 ZT20-23 0.804446 0.804446 0.804446