The Roman Senate has become concerned about the loyaltyof the army in Gaul comma

The Roman Senate has become concerned about the loyaltyof the army in Gaul commanded by Julius Caesar. They claim that ofthe 80000 men in the army at least 28000 are foreign barbarians.Caesar believes there are fewer barbarians so the Senate shouldnot worry. He polls one legion of 1000 men and finds that 340 ofthem are barbarians. What is the test statistic for this hypothesistest?