condition mean min max ZT0-3 1.2107965 1.2107965 1.2107965 ZT4-7 1.091555 1.091555 1.091555 ZT8-11 0.48244549999999997 0.48244549999999997 0.48244549999999997 ZT12-15 0.4030465 0.4030465 0.4030465 ZT16-19 0.549687 0.549687 0.549687 ZT20-23 1.0322695 1.0322695 1.0322695