condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.012138950833333334 0.0 0.024277901666666667 ZT16-19 0.012305164 0.0 0.024610328 ZT20-23 0.0 0.0 0.0