condition mean min max ZT0-3 19.11660501 15.86086558 22.37234444 ZT4-7 17.247018367499997 14.4541225 20.039914234999998 ZT8-11 45.869716177499996 27.95946945 63.779962905 ZT12-15 46.4604085175 38.526754034999996 54.394062999999996 ZT16-19 40.516538604999994 38.422468359999996 42.61060885 ZT20-23 33.99924772 31.7249306 36.27356484