condition mean min max ZT0-3 2036.3500000000001 2036.3500000000001 2036.3500000000001 ZT4-7 2944.0 2944.0 2944.0 ZT8-11 2609.25 2609.25 2609.25 ZT12-15 2375.1 2375.1 2375.1 ZT16-19 2533.45 2533.45 2533.45 ZT20-23 1991.8000000000002 1991.8000000000002 1991.8000000000002