condition mean min max ZT0-3 30.9232 30.9232 30.9232 ZT4-7 36.599900000000005 36.599900000000005 36.599900000000005 ZT8-11 25.001233333333335 25.001233333333335 25.001233333333335 ZT12-15 27.358999999999998 27.358999999999998 27.358999999999998 ZT16-19 49.0831 49.0831 49.0831 ZT20-23 40.6844 40.6844 40.6844