condition mean min max ZT0-3 5.8682718865000005 2.006434608 9.730109165 ZT4-7 18.081239312500003 16.011695895000003 20.15078273 ZT8-11 34.149806275 29.249886885000002 39.049725665 ZT12-15 19.91993188875 10.5174791375 29.32238464 ZT16-19 8.5419358145 7.7545203560000004 9.329351273 ZT20-23 3.9640354049999997 3.826998121 4.1010726889999995