condition mean min max ZT0-3 54.516337452500004 46.924993435000005 62.10768147 ZT4-7 12.65764178325 10.8492728505 14.466010716 ZT8-11 10.2007327575 9.5369468405 10.864518674500001 ZT12-15 9.80376270725 9.230795249 10.3767301655 ZT16-19 22.4785706125 16.860231545 28.09690968 ZT20-23 41.8650777875 40.56376224500001 43.16639333