condition mean min max ZT0-3 1.013772 1.0046275 1.0229165 ZT4-7 1.3098205 1.3098205 1.3098205 ZT8-11 6.021685 6.021685 6.021685 ZT12-15 0 0 0 ZT16-19 3.5899900000000002 3.5899900000000002 3.5899900000000002 ZT20-23 2.45507 2.45507 2.45507