condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.03475206983333333 0.0 0.06950413966666666 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.036689347500000004 0.0 0.07337869500000001 ZT20-23 0.0 0.0 0.0