condition mean min max ZT0-3 0.74855185975 0.242094518 1.2550092015 ZT4-7 3.08138828225 1.593498185 4.5692783795 ZT8-11 7.2671147965 5.184324306000001 9.349905286999999 ZT12-15 10.098235206000002 9.713674279500001 10.4827961325 ZT16-19 7.354952301 7.1813881685 7.5285164335 ZT20-23 13.787369331499999 10.154457403 17.42028126