condition mean min max ZT0-3 175.3 175.3 175.3 ZT4-7 643.3 643.3 643.3 ZT8-11 574.25 574.25 574.25 ZT12-15 439.59999999999997 439.59999999999997 439.59999999999997 ZT16-19 244.7 244.7 244.7 ZT20-23 169.10000000000002 169.10000000000002 169.10000000000002