condition mean min max ZT0-3 0.023431325 0.0 0.04686265 ZT4-7 0.095499 0.095499 0.095499 ZT8-11 0.0463634 0.0463634 0.0463634 ZT12-15 0 0 0 ZT16-19 0.046207 0.046207 0.046207 ZT20-23 0.0 0.0 0.0