condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0446327 0.0446327 0.0446327 ZT8-11 0.0353668 0.0353668 0.0353668 ZT12-15 0.0412143 0.0412143 0.0412143 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0