condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0244759 0.0244759 0.0244759 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0244082 0.0244082 0.0244082 ZT16-19 0.02164235 0.02164235 0.02164235 ZT20-23 0.0 0.0 0.0