condition mean min max ZT0-3 13.16027 13.16027 13.16027 ZT4-7 10.88124 10.88124 10.88124 ZT8-11 12.4215335 12.4215335 12.4215335 ZT12-15 14.500626 14.500626 14.500626 ZT16-19 12.318714 12.318714 12.318714 ZT20-23 16.0554405 16.0554405 16.0554405