The New York Times published an article called "In Michigan, a Milestone for a Mouse Methuselah" about a dwarf mouse that surprised scientists by living to the age of 4 years, much older than the average life span of 2 years.16 Based on this information, which one of these would be the best guess for standard deviation of dwarf mouse ages: one week, a couple of weeks, a few months, one year, or a few years?