condition mean min max ZT0-3 34.005700000000004 34.005700000000004 34.005700000000004 ZT4-7 27.2783 27.2783 27.2783 ZT8-11 24.99455 24.99455 24.99455 ZT12-15 27.3839 27.3839 27.3839 ZT16-19 39.608999999999995 39.608999999999995 39.608999999999995 ZT20-23 39.85835 39.85835 39.85835