condition mean min max ZT0-3 66.886918 66.886918 66.886918 ZT4-7 74.55634649999999 74.55634649999999 74.55634649999999 ZT8-11 104.04280849999999 104.04280849999999 104.04280849999999 ZT12-15 183.90484650000002 183.90484650000002 183.90484650000002 ZT16-19 117.3363045 117.3363045 117.3363045 ZT20-23 53.004429 53.004429 53.004429