condition mean min max ZT0-3 11.453185000000001 9.945170000000001 12.961200000000002 ZT4-7 44.58345 44.58345 44.58345 ZT8-11 97.91725 97.91725 97.91725 ZT12-15 0 0 0 ZT16-19 24.08885 24.08885 24.08885 ZT20-23 14.20875 14.20875 14.20875