condition mean min max ZT0-3 211.45208 211.45208 211.45208 ZT4-7 191.5103075 191.5103075 191.5103075 ZT8-11 224.942926 224.942926 224.942926 ZT12-15 244.34794649999998 244.34794649999998 244.34794649999998 ZT16-19 265.966197 265.966197 265.966197 ZT20-23 231.9522945 231.9522945 231.9522945