condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.092257129 0.0 0.184514258 ZT8-11 0.012453494 0.0 0.024906988 ZT12-15 0.025173933 0.0 0.050347866 ZT16-19 0.052138393000000005 0.04040190766666667 0.06387487833333334 ZT20-23 0.0106480725 0.0 0.021296145