condition mean min max ZT0-3 56.57925 51.0846 62.0739 ZT4-7 22.839750000000002 22.839750000000002 22.839750000000002 ZT8-11 14.0918 14.0918 14.0918 ZT12-15 0 0 0 ZT16-19 33.8917 33.8917 33.8917 ZT20-23 48.7369 48.7369 48.7369