condition mean min max ZT0-3 1577.9 1577.9 1577.9 ZT4-7 1162.3 1162.3 1162.3 ZT8-11 1090.8000000000002 1090.8000000000002 1090.8000000000002 ZT12-15 946.0 946.0 946.0 ZT16-19 1289.25 1289.25 1289.25 ZT20-23 1459.6 1459.6 1459.6