A metropolitan law enforcement agency classifies crimes committed within its jurisdiction as either quot;violentquot; or quot;nonviolent.

A metropolitan law enforcement agency classifies crimes committed within its jurisdiction as either "violent" or "nonviolent." An investigation has been ordered to find out whether the type of crime (violent or nonviolent) depends on the age of the person who committed it. A sample of 100 crimes was selected at random from the police files. The results are cross-classified in the following contingency table.

Classification of Crimes by Type a