condition mean min max ZT0-3 46.578757 46.578757 46.578757 ZT4-7 44.122341000000006 44.122341000000006 44.122341000000006 ZT8-11 40.7351335 40.7351335 40.7351335 ZT12-15 35.988066 35.988066 35.988066 ZT16-19 45.6786725 45.6786725 45.6786725 ZT20-23 51.564080000000004 51.564080000000004 51.564080000000004