condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.022239674 0.0 0.044479348 ZT8-11 0.0 0.0 0.0 ZT12-15 0.08708252083333333 0.0 0.17416504166666666 ZT16-19 0.0220136085 0.0 0.044027217 ZT20-23 0.2625925646666667 0.0 0.5251851293333334