condition mean min max ZT0-3 3.1187300000000002 2.07729 4.16017 ZT4-7 4.170305 4.170305 4.170305 ZT8-11 10.4086 10.4086 10.4086 ZT12-15 0 0 0 ZT16-19 5.7807 5.7807 5.7807 ZT20-23 12.360800000000001 12.360800000000001 12.360800000000001