condition mean min max ZT0-3 0.47352740975 0.1454432955 0.801611524 ZT4-7 0.12990176025 0.063775594 0.1960279265 ZT8-11 1.9079053475 1.5472816274999999 2.2685290675000003 ZT12-15 20.18333205875 12.0038637725 28.362800345 ZT16-19 37.182026825 32.097029905 42.267023745 ZT20-23 56.05525052 46.238121515 65.872379525