condition mean min max ZT0-3 0.06838915725 0.0636494575 0.073128857 ZT4-7 1.0007357152499998 0.17238467000000002 1.8290867604999999 ZT8-11 5.196156971500001 4.1666612545 6.2256526885 ZT12-15 6.73708308175 6.665572615 6.808593548499999 ZT16-19 7.164292742 5.724883611999999 8.603701872 ZT20-23 13.79300396 12.299728685 15.286279235