condition mean min max ZT0-3 30.196813 30.196813 30.196813 ZT4-7 26.9596245 26.9596245 26.9596245 ZT8-11 24.60491 24.60491 24.60491 ZT12-15 82.598881 82.598881 82.598881 ZT16-19 46.315875 46.315875 46.315875 ZT20-23 103.2499935 103.2499935 103.2499935