condition mean min max ZT0-3 2.6207375 1.363525 4.325545 ZT4-7 5.3812145e-09 5.3812145e-09 5.3812145e-09 ZT8-11 1.2865735 1.2865735 1.2865735 ZT12-15 5.455550000000001 4.657655 6.253445 ZT16-19 5.102265 5.102265 5.102265 ZT20-23 3.1479299999999997 3.1479299999999997 3.1479299999999997