condition mean min max ZT0-3 0.8298995 0.8298995 0.8298995 ZT4-7 0.8213765 0.8213765 0.8213765 ZT8-11 0.23375 0.23375 0.23375 ZT12-15 0.0945424 0.0945424 0.0945424 ZT16-19 0.4177655 0.4177655 0.4177655 ZT20-23 0.7700610000000001 0.7700610000000001 0.7700610000000001