condition mean min max ZT0-3 0.021660350000000002 0.021660350000000002 0.021660350000000002 ZT4-7 0.0781175 0.0781175 0.0781175 ZT8-11 0.0111643 0.0111643 0.0111643 ZT12-15 0.122435 0.122435 0.122435 ZT16-19 0.08094965000000001 0.08094965000000001 0.08094965000000001 ZT20-23 0.08905915 0.08905915 0.08905915