condition mean min max ZT0-3 0.17473816666666667 0.0 0.339629 ZT4-7 0.0 0.0 0.0 ZT8-11 0.2055385 0.2055385 0.2055385 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.432944 0.432944 0.432944