condition mean min max ZT0-3 0.0452289385 0.018323218999999998 0.072134658 ZT4-7 0.0 0.0 0.0 ZT8-11 0.9846691925 0.18291105600000002 1.786427329 ZT12-15 2.959351699 2.949958219 2.968745179 ZT16-19 1.9366706065 1.341404001 2.531937212 ZT20-23 0.40366281225 0.30231467450000005 0.50501095