condition mean min max ZT0-3 0.0087441 0.0 0.0174882 ZT4-7 0.01765005 0.01765005 0.01765005 ZT8-11 0.053644700000000003 0.053644700000000003 0.053644700000000003 ZT12-15 0 0 0 ZT16-19 0.0176512 0.0176512 0.0176512 ZT20-23 0.0177795 0.0177795 0.0177795