condition mean min max ZT0-3 29.1697 29.1697 29.1697 ZT4-7 13.4213 13.4213 13.4213 ZT8-11 35.2367 35.2367 35.2367 ZT12-15 72.9839 72.9839 72.9839 ZT16-19 57.4916 57.4916 57.4916 ZT20-23 47.9902 47.9902 47.9902