condition mean min max ZT0-3 0.1572581 0.1572581 0.1572581 ZT4-7 0.103718 0.103718 0.103718 ZT8-11 1.4434900000000002 1.4434900000000002 1.4434900000000002 ZT12-15 3.250615 3.250615 3.250615 ZT16-19 2.642625 2.642625 2.642625 ZT20-23 1.240275 1.240275 1.240275