condition mean min max ZT0-3 0.60387 0.60387 0.60387 ZT4-7 1.372985 1.372985 1.372985 ZT8-11 0.6795635 0.6795635 0.6795635 ZT12-15 0.2543555 0.2543555 0.2543555 ZT16-19 0.5491900000000001 0.5491900000000001 0.5491900000000001 ZT20-23 0.7717745 0.7717745 0.7717745