condition mean min max ZT0-3 1743.5500000000002 1743.5500000000002 1743.5500000000002 ZT4-7 1583.6 1583.6 1583.6 ZT8-11 1337.95 1337.95 1337.95 ZT12-15 1725.8500000000001 1725.8500000000001 1725.8500000000001 ZT16-19 1578.95 1578.95 1578.95 ZT20-23 1628.5500000000002 1628.5500000000002 1628.5500000000002