condition mean min max ZT0-3 977.7 977.7 977.7 ZT4-7 1282.8 1282.8 1282.8 ZT8-11 1297.35 1297.35 1297.35 ZT12-15 1238.1 1238.1 1238.1 ZT16-19 960.3 960.3 960.3 ZT20-23 976.35 976.35 976.35