Suppose that a national real estate magazine advertised that 10%of first-time home buyers had a family income below $41,000.
A national real estate firm believes this percentage is too low and samples100of its records. The firm finds that20of its first-time home buyers did have a family income below
$41,000.
Does the sample suggest that the proportion of first-time home buyers with an income less than $41,000 is more than10%?
Comment and write up your own conclusions based on an appropriate confidence interval as well as a hypothesis test. Include any assumptions you made about the data.
Create a 90%confidence interval.
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