condition mean min max ZT0-3 1156.1 1156.1 1156.1 ZT4-7 1305.8 1305.8 1305.8 ZT8-11 1129.75 1129.75 1129.75 ZT12-15 1001.45 1001.45 1001.45 ZT16-19 996.5 996.5 996.5 ZT20-23 975.5 975.5 975.5