condition mean min max ZT0-3 2.8283925 2.2293250000000002 3.42746 ZT4-7 2.45612 2.45612 2.45612 ZT8-11 1.23826 1.23826 1.23826 ZT12-15 0 0 0 ZT16-19 3.896245 3.896245 3.896245 ZT20-23 1.712165 1.712165 1.712165