condition mean min max ZT0-3 5.48895 5.48895 5.48895 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 3.23385 3.23385 3.23385 ZT20-23 2.3948 2.3948 2.3948