What is the average age of all the people in Pennsylvania?

If you are young and guessing you will probably guess way to old (probably around 50 which seens ancient to young people.) If you are a geriatric you will guess way to low (about 27) and be wrong because everyone seems so young. If you are a statistician the answer is 39.7 years of age simply because it is a statistical fact.

The US Census reports that the median age of all US Citizens is 35.3 years of age and the 2010 Census when taken and released will probably contain some interesting new data points, demographic shifts and population movements.