condition mean min max ZT0-3 1609.6 1609.6 1609.6 ZT4-7 2338.8 2338.8 2338.8 ZT8-11 2018.4499999999998 2018.4499999999998 2018.4499999999998 ZT12-15 1765.15 1765.15 1765.15 ZT16-19 1711.25 1711.25 1711.25 ZT20-23 1397.15 1397.15 1397.15