The jury was originally developed to put a sense of balance and justice into the decision of whether a person was guilty of a crime that he/she was charged with. Modern juries are the result of many...
Yes, it is.
A hung jury is unable to reach unanimity on a verdict.
You get selected at random. You can only be selected if you are registered to vote.
The US Constitution provided for a jury system so that people could be judged by their peers, who could be independent from government.