condition mean min max ZT0-3 0.10169655 0.01834235 0.150682 ZT4-7 0.0558125 0.0558125 0.0558125 ZT8-11 0.0378184 0.0378184 0.0378184 ZT12-15 0.30476425 0.193939 0.4155895 ZT16-19 0.3234225 0.3234225 0.3234225 ZT20-23 0.2802465 0.2802465 0.2802465