condition mean min max ZT0-3 0.21625075 0.13807 0.2944315 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0562387 0.0562387 0.0562387 ZT12-15 0 0 0 ZT16-19 0.08265829999999999 0.08265829999999999 0.08265829999999999 ZT20-23 0.15269485 0.15269485 0.15269485