condition mean min max ZT0-3 0.3506645 0.30545449999999996 0.3958745 ZT4-7 0.309255 0.309255 0.309255 ZT8-11 1.062862 1.062862 1.062862 ZT12-15 0 0 0 ZT16-19 0.563083 0.563083 0.563083 ZT20-23 0.13064065 0.13064065 0.13064065