condition mean min max ZT0-3 46.427504782499994 45.98450872 46.870500844999995 ZT4-7 18.944827825 16.70984388 21.17981177 ZT8-11 33.094822484999995 22.18836461 44.001280359999996 ZT12-15 40.0172076175 34.15894426 45.875470975 ZT16-19 30.501884175 24.74601011 36.25775824 ZT20-23 14.235375674250001 11.1213562135 17.349395135