condition mean min max ZT0-3 0.15677916666666666 0.0 0.4703375 ZT4-7 0.0 0.0 0.0 ZT8-11 0.427642 0.427642 0.427642 ZT12-15 0.0 0.0 0.0 ZT16-19 0.450241 0.450241 0.450241 ZT20-23 0.545105 0.545105 0.545105