condition mean min max ZT0-3 14.9946 14.59075 15.39845 ZT4-7 12.7193 12.7193 12.7193 ZT8-11 16.0337 16.0337 16.0337 ZT12-15 0 0 0 ZT16-19 16.44325 16.44325 16.44325 ZT20-23 14.653500000000001 14.653500000000001 14.653500000000001