condition mean min max ZT0-3 0.5563750000000001 0.367772 0.744978 ZT4-7 0.189684 0.189684 0.189684 ZT8-11 0.7526775 0.7526775 0.7526775 ZT12-15 0 0 0 ZT16-19 1.09917 1.09917 1.09917 ZT20-23 0.551581 0.551581 0.551581