condition mean min max ZT0-3 0.0326370665 0.0 0.065274133 ZT4-7 1.35962600775 0.37334939899999997 2.3459026165 ZT8-11 17.5160637265 10.017977388 25.014150065000003 ZT12-15 18.29169052575 11.2544381665 25.328942885 ZT16-19 3.50438127325 2.369543869 4.6392186775 ZT20-23 0.5337748127499999 0.1100595595 0.957490066