condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.6536495 0.6536495 0.6536495 ZT8-11 0.479889 0.479889 0.479889 ZT12-15 0 0 0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.15924 0.15924 0.15924