condition mean min max ZT0-3 31.25145 31.25145 31.25145 ZT4-7 22.249000000000002 22.249000000000002 22.249000000000002 ZT8-11 18.58005 18.58005 18.58005 ZT12-15 18.01625 18.01625 18.01625 ZT16-19 34.33045 34.33045 34.33045 ZT20-23 31.726149999999997 31.726149999999997 31.726149999999997