condition mean min max ZT0-3 0.8764597500000001 0.5359695 1.2169500000000002 ZT4-7 2.7362900000000003 2.7362900000000003 2.7362900000000003 ZT8-11 3.390645 3.390645 3.390645 ZT12-15 0 0 0 ZT16-19 0.7376134999999999 0.7376134999999999 0.7376134999999999 ZT20-23 0.9531375 0.9531375 0.9531375