condition mean min max ZT0-3 1.114715 1.114715 1.114715 ZT4-7 0.302648 0.302648 0.302648 ZT8-11 0.320898 0.320898 0.320898 ZT12-15 0.54438 0.54438 0.54438 ZT16-19 0.375282 0.375282 0.375282 ZT20-23 0.0 0.0 0.0