condition mean min max ZT0-3 0.96579675 0.865903 1.0656904999999999 ZT4-7 0.6467665 0.6467665 0.6467665 ZT8-11 1.0107855 1.0107855 1.0107855 ZT12-15 0 0 0 ZT16-19 0.7812655 0.7812655 0.7812655 ZT20-23 1.2128685 1.2128685 1.2128685