condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.12285361616666668 0.0 0.24570723233333336 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.044170870166666674 0.0 0.08834174033333335