condition mean min max ZT0-3 0.49071075 0.0959945 0.885427 ZT4-7 0.193766 0.193766 0.193766 ZT8-11 0.394488 0.394488 0.394488 ZT12-15 0 0 0 ZT16-19 0.096508 0.096508 0.096508 ZT20-23 0.581483 0.581483 0.581483