condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0303977 0.0303977 0.0303977 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0249458 0.0249458 0.0249458 ZT16-19 0.0 0.0 0.0 ZT20-23 0.054835999999999996 0.054835999999999996 0.054835999999999996