condition mean min max ZT0-3 46.48811666666667 46.48811666666667 46.48811666666667 ZT4-7 70.463775 70.463775 70.463775 ZT8-11 99.241175 99.241175 99.241175 ZT12-15 90.02805833333333 90.02805833333333 90.02805833333333 ZT16-19 73.12344999999999 73.12344999999999 73.12344999999999 ZT20-23 62.902074999999996 62.902074999999996 62.902074999999996