For example, a lower volatility stock may have an expected (average) return of 7%, with annual volatility of 5%. This would indicate returns from approximately negative 3% to positive 17% most of the time (19 times out of 20, or 95% via a two standard deviation rule).
To join the enlisted ranks, in general you must: 1  Be a U.S. citizen or Green Card holder Non-citizens must speak, read, and write English fluently. Non-citizens must currently live in the U.S. 2  Be in good health. 3  Be 17 to 40 years old (different branches have different age requirements). View a chart of age requirements by service.
There were soldiers of all ages that fought during the war. The average age for the Union Army was around 25 years old. The minimum age to join the army was 18 years old, however, it's thought that many young boys lied about their age and, by the end of the war, there were thousands of soldiers as young as 15 years old.