condition mean min max ZT0-3 0.06115125 0.0 0.1223025 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.027983 0.0 0.055966 ZT16-19 0.05890383333333333 0.0 0.11780766666666666 ZT20-23 0 0 0