condition mean min max ZT0-3 1233.75 1233.75 1233.75 ZT4-7 1495.9 1495.9 1495.9 ZT8-11 1741.05 1741.05 1741.05 ZT12-15 2127.3 2127.3 2127.3 ZT16-19 2034.75 2034.75 2034.75 ZT20-23 1644.2 1644.2 1644.2