condition mean min max ZT0-3 66.16105 66.16105 66.16105 ZT4-7 56.34315 56.34315 56.34315 ZT8-11 46.4542 46.4542 46.4542 ZT12-15 49.28725 49.28725 49.28725 ZT16-19 66.6263 66.6263 66.6263 ZT20-23 67.8209 67.8209 67.8209