condition mean min max ZT0-3 5.6075667575 1.372523035 9.84261048 ZT4-7 0.644041575 0.45422765500000006 0.833855495 ZT8-11 3.2340885045 1.299478669 5.16869834 ZT12-15 8.443833749500001 7.571459054 9.316208445000001 ZT16-19 5.002379107 3.7504291885 6.254329025500001 ZT20-23 1.89562282075 1.4107827240000002 2.3804629175