condition mean min max ZT0-3 1848.3000000000002 1848.3000000000002 1848.3000000000002 ZT4-7 1880.5 1880.5 1880.5 ZT8-11 2573.4 2573.4 2573.4 ZT12-15 2350.0 2350.0 2350.0 ZT16-19 2501.8 2501.8 2501.8 ZT20-23 1915.25 1915.25 1915.25