condition mean min max ZT0-3 777.1500000000001 777.1500000000001 777.1500000000001 ZT4-7 3319.0 3319.0 3319.0 ZT8-11 3379.15 3379.15 3379.15 ZT12-15 2173.6499999999996 2173.6499999999996 2173.6499999999996 ZT16-19 760.9000000000001 760.9000000000001 760.9000000000001 ZT20-23 560.2 560.2 560.2