condition mean min max ZT0-3 1002.25 1002.25 1002.25 ZT4-7 1019.0 1019.0 1019.0 ZT8-11 1365.5 1365.5 1365.5 ZT12-15 996.75 996.75 996.75 ZT16-19 926.4 926.4 926.4 ZT20-23 1093.2 1093.2 1093.2