condition mean min max ZT0-3 0.6197335 0.508219 0.6848000000000001 ZT4-7 0.3192645 0.3192645 0.3192645 ZT8-11 0.1652395 0.1652395 0.1652395 ZT12-15 0.9548304999999999 0.827001 1.08266 ZT16-19 1.051142 1.051142 1.051142 ZT20-23 1.240445 1.240445 1.240445