Millionaires are Baby Boomers (or Older) For most Americans, incomes tend to rise with age and experience. Thus, it is not surprising that in 2009, 80 percent of millionaires were older than age 45 and close to half of all millionaires (46 percent) were older than age 55.
A hypothesis (plural hypotheses) is a proposed explanation for a phenomenon. For a hypothesis to be a scientific hypothesis, the scientific method requires that one can test it.
1 A theory is an hypothesis that has stood the test of time. 2  It is a well-substantiated explanation of some aspect of the natural world.  It is an organized system of accepted knowledge that applies in a variety of circumstances to explain a specific set of phenomena or observations.