condition mean min max ZT0-3 1403.5500000000002 1403.5500000000002 1403.5500000000002 ZT4-7 1674.6 1674.6 1674.6 ZT8-11 1628.1 1628.1 1628.1 ZT12-15 1508.05 1508.05 1508.05 ZT16-19 1454.15 1454.15 1454.15 ZT20-23 1339.8 1339.8 1339.8