condition mean min max ZT0-3 234.687148 234.687148 234.687148 ZT4-7 290.37654799999996 290.37654799999996 290.37654799999996 ZT8-11 300.673561 300.673561 300.673561 ZT12-15 272.369325 272.369325 272.369325 ZT16-19 340.755171 340.755171 340.755171 ZT20-23 286.825212 286.825212 286.825212