In 2000, 58% of females aged 15 years of age and older lived alone, according to the U.S. Census Bureau. A sociologist tests whether this percentage is different today by conducting a random sample of 500 females aged 15 years of age and older and ?nds that 285 are living alone. Is there suf?cient evidence at the ? = 0.1 level of signi?cance to conclude the proportion has changed since 2000?
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