condition mean min max ZT0-3 1.6290705 0.9981960000000001 2.259945 ZT4-7 3.10684 3.10684 3.10684 ZT8-11 1.9114200000000001 1.9114200000000001 1.9114200000000001 ZT12-15 0 0 0 ZT16-19 1.865715 1.865715 1.865715 ZT20-23 1.775955 1.775955 1.775955