(Step-by-Step) As part of an opinion survey, a simple random sample of 900 families is taken in a certain town with a population of 25,000. The average
Question: As part of an opinion survey, a simple random sample of 900 families is taken in a certain town with a population of 25,000. The average income of these 900 families is $60,000. The SD of the sample is $30,000. Find a 95% confidence interval for the average income of all of the families in this town.
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