condition mean min max ZT0-3 0.8916934304999999 0.39445650600000004 1.3889303549999998 ZT4-7 5.46320823025 3.3915187390000003 7.5348977215 ZT8-11 9.4921428195 9.014047395 9.970238243999999 ZT12-15 6.384177912 6.209753402 6.558602422 ZT16-19 2.6705077395 2.595919974 2.745095505 ZT20-23 3.9214811802500003 3.519762119 4.3232002415