condition mean min max ZT0-3 0.0102178 0.0 0.0306534 ZT4-7 0.0291782 0.0291782 0.0291782 ZT8-11 0.0296566 0.0296566 0.0296566 ZT12-15 0.0163898 0.0 0.0327796 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0622965 0.0622965 0.0622965