condition mean min max ZT0-3 35.2386 23.04025 50.4731 ZT4-7 52.108850000000004 52.108850000000004 52.108850000000004 ZT8-11 51.9131 51.9131 51.9131 ZT12-15 51.898900000000005 47.203900000000004 56.593900000000005 ZT16-19 33.945499999999996 33.945499999999996 33.945499999999996 ZT20-23 34.49765 34.49765 34.49765