condition mean min max ZT0-3 82.630769 82.630769 82.630769 ZT4-7 90.2184175 90.2184175 90.2184175 ZT8-11 120.70350149999999 120.70350149999999 120.70350149999999 ZT12-15 103.6686835 103.6686835 103.6686835 ZT16-19 95.0597735 95.0597735 95.0597735 ZT20-23 79.253425 79.253425 79.253425