condition mean min max ZT0-3 4.781235000000001 4.722440000000001 4.8400300000000005 ZT4-7 4.65803 4.65803 4.65803 ZT8-11 3.19312 3.19312 3.19312 ZT12-15 0 0 0 ZT16-19 3.41385 3.41385 3.41385 ZT20-23 3.77039 3.77039 3.77039