condition mean min max ZT0-3 37.9914 37.9914 37.9914 ZT4-7 22.9994 22.9994 22.9994 ZT8-11 15.89715 15.89715 15.89715 ZT12-15 62.0539 62.0539 62.0539 ZT16-19 100.79905 100.79905 100.79905 ZT20-23 47.95985 47.95985 47.95985