condition mean min max ZT0-3 87.15035 87.15035 87.15035 ZT4-7 171.2255 171.2255 171.2255 ZT8-11 98.8364 98.8364 98.8364 ZT12-15 41.159 41.159 41.159 ZT16-19 17.8142 17.8142 17.8142 ZT20-23 24.1278 24.1278 24.1278