condition mean min max ZT0-3 0.08322718333333333 0.04893765 0.13012295 ZT4-7 0.07764465 0.07764465 0.07764465 ZT8-11 0.20760699999999999 0.20760699999999999 0.20760699999999999 ZT12-15 0.404052 0.399579 0.408525 ZT16-19 0.37206649999999997 0.37206649999999997 0.37206649999999997 ZT20-23 0.30727 0.30727 0.30727