condition mean min max ZT0-3 81.32762500000001 79.45240000000001 83.20285000000001 ZT4-7 78.1779 78.1779 78.1779 ZT8-11 153.8295 153.8295 153.8295 ZT12-15 0 0 0 ZT16-19 177.65800000000002 177.65800000000002 177.65800000000002 ZT20-23 144.03699999999998 144.03699999999998 144.03699999999998