condition mean min max ZT0-3 1011.75 1011.75 1011.75 ZT4-7 970.3 970.3 970.3 ZT8-11 1137.2 1137.2 1137.2 ZT12-15 1128.95 1128.95 1128.95 ZT16-19 1028.0 1028.0 1028.0 ZT20-23 1044.35 1044.35 1044.35