condition mean min max ZT0-3 0.240401 0.0 0.492194 ZT4-7 0.0 0.0 0.0 ZT8-11 0.8263 0.8263 0.8263 ZT12-15 0.2558825 0.0 0.511765 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0