condition mean min max ZT0-3 24.0 24.0 24.0 ZT4-7 0.7 0.7 0.7 ZT8-11 10.899999999999999 10.899999999999999 10.899999999999999 ZT12-15 22.05 22.05 22.05 ZT16-19 15.6 15.6 15.6 ZT20-23 0.75 0.75 0.75