condition mean min max ZT0-3 1931.1000000000001 1931.1000000000001 1931.1000000000001 ZT4-7 1539.6 1539.6 1539.6 ZT8-11 1559.85 1559.85 1559.85 ZT12-15 1658.1 1658.1 1658.1 ZT16-19 1730.75 1730.75 1730.75 ZT20-23 1863.35 1863.35 1863.35