condition mean min max ZT0-3 0.6835936666666667 0.0 1.7641149999999999 ZT4-7 0.660806 0.660806 0.660806 ZT8-11 0.0 0.0 0.0 ZT12-15 0.018021625853102498 1.706205e-09 0.03604325 ZT16-19 0.594105 0.594105 0.594105 ZT20-23 0.0 0.0 0.0