condition mean min max ZT0-3 0.06435759225000001 0.0406909565 0.08802422800000001 ZT4-7 0.1079272835 0.0914930675 0.1243614995 ZT8-11 0.39348475149999995 0.2032619625 0.5837075405 ZT12-15 2.15605677875 1.7761712845 2.535942273 ZT16-19 1.51611829875 1.211800011 1.8204365865 ZT20-23 0.67550392725 0.5671892715 0.783818583