condition mean min max ZT0-3 24.135344 24.135344 24.135344 ZT4-7 121.7552125 121.7552125 121.7552125 ZT8-11 129.622462 129.622462 129.622462 ZT12-15 45.170945 45.170945 45.170945 ZT16-19 30.5590895 30.5590895 30.5590895 ZT20-23 24.128856 24.128856 24.128856