condition mean min max ZT0-3 10.5228775 7.176205 13.86955 ZT4-7 10.9738 10.9738 10.9738 ZT8-11 46.14385 46.14385 46.14385 ZT12-15 0 0 0 ZT16-19 14.0318 14.0318 14.0318 ZT20-23 12.74615 12.74615 12.74615