condition mean min max ZT0-3 0.013060366666666667 0.0 0.02774345 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0154242 0.0 0.0308484 ZT16-19 0.0 0.0 0.0 ZT20-23 0.074437 0.074437 0.074437