condition mean min max ZT0-3 13.2482808775 10.81203253 15.684529224999999 ZT4-7 10.82667025875 10.08773733 11.565603187499999 ZT8-11 15.526440084999999 13.290814059999999 17.76206611 ZT12-15 20.60513799 20.36941425 20.84086173 ZT16-19 25.01138319 23.24044335 26.78232303 ZT20-23 27.529137239999997 27.26933757 27.788936909999997