condition mean min max ZT0-3 1.23311475 1.0393245 1.426905 ZT4-7 0.909516 0.909516 0.909516 ZT8-11 1.951425 1.951425 1.951425 ZT12-15 0 0 0 ZT16-19 2.39973 2.39973 2.39973 ZT20-23 1.474665 1.474665 1.474665