condition mean min max ZT0-3 0.0129733 0.0 0.0259466 ZT4-7 0.0529465 0.0529465 0.0529465 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 0.02561795 0.02561795 0.02561795 ZT20-23 0.0 0.0 0.0