condition mean min max ZT0-3 0.17737633333333333 0.1668035 0.1872715 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.186708 0.0 0.373416 ZT16-19 0.1663835 0.1663835 0.1663835 ZT20-23 0.368544 0.368544 0.368544