condition mean min max ZT0-3 128.524275 124.13305 132.9155 ZT4-7 173.67450000000002 173.67450000000002 173.67450000000002 ZT8-11 181.949 181.949 181.949 ZT12-15 0 0 0 ZT16-19 211.7985 211.7985 211.7985 ZT20-23 227.714 227.714 227.714