condition mean min max ZT0-3 16.8401 13.911200000000001 19.769 ZT4-7 25.4161 25.4161 25.4161 ZT8-11 56.6923 56.6923 56.6923 ZT12-15 0 0 0 ZT16-19 32.839600000000004 32.839600000000004 32.839600000000004 ZT20-23 27.484650000000002 27.484650000000002 27.484650000000002