condition mean min max ZT0-3 0.18008725 0.1300465 0.230128 ZT4-7 0.207501 0.207501 0.207501 ZT8-11 0.597151 0.597151 0.597151 ZT12-15 0 0 0 ZT16-19 0.766623 0.766623 0.766623 ZT20-23 0.4369455 0.4369455 0.4369455