condition mean min max ZT0-3 6.578575 6.578575 6.578575 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 3.9210149999999997 3.9210149999999997 3.9210149999999997 ZT16-19 2.96755 2.96755 2.96755 ZT20-23 0.0 0.0 0.0