condition mean min max ZT0-3 104.537277 104.537277 104.537277 ZT4-7 121.1882655 121.1882655 121.1882655 ZT8-11 117.036914 117.036914 117.036914 ZT12-15 120.40112400000001 120.40112400000001 120.40112400000001 ZT16-19 178.6704365 178.6704365 178.6704365 ZT20-23 171.258576 171.258576 171.258576