condition mean min max ZT0-3 3.6959925 3.591375 3.80061 ZT4-7 3.408985 3.408985 3.408985 ZT8-11 3.63976 3.63976 3.63976 ZT12-15 0 0 0 ZT16-19 4.940325 4.940325 4.940325 ZT20-23 3.592995 3.592995 3.592995