condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0344483 0.0344483 0.0344483 ZT8-11 0.0 0.0 0.0 ZT12-15 0.055353675000000005 0.0 0.11070735000000001 ZT16-19 0.24282700000000002 0.24282700000000002 0.24282700000000002 ZT20-23 0.07764685 0.07764685 0.07764685