condition mean min max ZT0-3 621.15 621.15 621.15 ZT4-7 965.9 965.9 965.9 ZT8-11 1432.3000000000002 1432.3000000000002 1432.3000000000002 ZT12-15 1810.1 1810.1 1810.1 ZT16-19 1520.1 1520.1 1520.1 ZT20-23 980.4499999999999 980.4499999999999 980.4499999999999