condition mean min max ZT0-3 1.635065 1.635065 1.635065 ZT4-7 0.26441313 0.26441313 0.26441313 ZT8-11 0.6587725 0.6587725 0.6587725 ZT12-15 0.63301 0.63301 0.63301 ZT16-19 0.30096924999999997 0.30096924999999997 0.30096924999999997 ZT20-23 0.66493462 0.66493462 0.66493462