condition mean min max ZT0-3 0.3586884166666667 0.1926865 0.5250715 ZT4-7 0.178753 0.178753 0.178753 ZT8-11 0.48886 0.48886 0.48886 ZT12-15 0.955366 0.9177975 0.9929345 ZT16-19 0.6994955 0.6994955 0.6994955 ZT20-23 0.3265795 0.3265795 0.3265795