condition mean min max ZT0-3 0.9781479999999999 0.657141 1.2991549999999998 ZT4-7 1.4407 1.4407 1.4407 ZT8-11 2.8560049999999997 2.8560049999999997 2.8560049999999997 ZT12-15 0 0 0 ZT16-19 2.70695 2.70695 2.70695 ZT20-23 2.04168 2.04168 2.04168