condition mean min max ZT0-3 2066.85 2066.85 2066.85 ZT4-7 1886.7 1886.7 1886.7 ZT8-11 1660.8000000000002 1660.8000000000002 1660.8000000000002 ZT12-15 1772.7 1772.7 1772.7 ZT16-19 2018.95 2018.95 2018.95 ZT20-23 2168.8 2168.8 2168.8