condition mean min max ZT0-3 64.78195 64.5238 65.0401 ZT4-7 70.7908 70.7908 70.7908 ZT8-11 66.30869999999999 66.30869999999999 66.30869999999999 ZT12-15 0 0 0 ZT16-19 78.3185 78.3185 78.3185 ZT20-23 76.77735 76.77735 76.77735