condition mean min max ZT0-3 1551.15 1551.15 1551.15 ZT4-7 2491.3 2491.3 2491.3 ZT8-11 2037.1999999999998 2037.1999999999998 2037.1999999999998 ZT12-15 2406.6 2406.6 2406.6 ZT16-19 1789.1 1789.1 1789.1 ZT20-23 1593.7 1593.7 1593.7