condition mean min max ZT0-3 109.665087 109.665087 109.665087 ZT4-7 46.907666500000005 46.907666500000005 46.907666500000005 ZT8-11 23.3718595 23.3718595 23.3718595 ZT12-15 50.942693500000004 50.942693500000004 50.942693500000004 ZT16-19 61.789212000000006 61.789212000000006 61.789212000000006 ZT20-23 35.1620965 35.1620965 35.1620965