condition mean min max ZT0-3 0.2514645 0.2030145 0.2999145 ZT4-7 0.6906765 0.6906765 0.6906765 ZT8-11 3.0772649999999997 3.0772649999999997 3.0772649999999997 ZT12-15 0 0 0 ZT16-19 2.293635 2.293635 2.293635 ZT20-23 0.827428 0.827428 0.827428