condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0868865 0.0868865 0.0868865 ZT12-15 0.08543624999999999 0.0744705 0.096402 ZT16-19 0.12033671635 0.12033671635 0.12033671635 ZT20-23 0.0543095 0.0543095 0.0543095