condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.024328083333333334 0.024328083333333334 0.024328083333333334 ZT12-15 0.01290426 0.01290426 0.01290426 ZT16-19 0.061934499999999997 0.061934499999999997 0.061934499999999997 ZT20-23 0.0254545 0.0254545 0.0254545