condition mean min max ZT0-3 0.55280175 0.39655799999999997 0.7090455 ZT4-7 2.45463 2.45463 2.45463 ZT8-11 3.215005 3.215005 3.215005 ZT12-15 0 0 0 ZT16-19 1.418282 1.418282 1.418282 ZT20-23 1.924985 1.924985 1.924985