Use the one-proportion z-test to perform an appropriate hypothesis test. Be sure to check the conditions for using that procedure.
Families in poverty. In 2006, 9.8% of all U.S. families had income below the poverty level.During the same year,400 randomly selected Wyoming familes, 25 had incomes below the poverty level.At the 1% significance level,do the data provide sufficient evidence to conclude that, in 2006, the percentage of families with incomes below poverty level was lower among those living in wyoming than than among all U.S. families?