condition mean min max ZT0-3 13.413174999999999 13.25605 13.5703 ZT4-7 10.588429999999999 10.588429999999999 10.588429999999999 ZT8-11 18.5178 18.5178 18.5178 ZT12-15 0 0 0 ZT16-19 22.8389 22.8389 22.8389 ZT20-23 16.8006 16.8006 16.8006