in a previous year 51 of females aged 15 years of age and older l23158
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in a previous year, 51% of females aged 15 years of age and older lived alone. A sociologist tests whether this percentage is different today by conducting a random sample
of 400 females aged 15 years of age and older and finds that 216 are living alone. Is there sufficient evidence at the a=0.1 level of significance to conclude the proportion has changed?