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Satisfied?A poll taken by the General Social Survey in 2010 asked people in the United States...

Satisfied?A poll taken by the General Social Survey in 2010 asked people in the United States whether they were satisfied with their financial situation. A total of 478 out of 2038 people said they were satisfied. The same question was asked in 2014, and 698 out of 2532 people said they were satisfied.

a. Construct a 95% confidence interval for the difference between the proportion of adults who said they were satisfied in 2014 and the proportion in 2010.

b. A sociologist claims that the proportion of people who are satisfied increased from 2010 to 2014 by more than 0.05. Does the confidence interval contradict this claim?

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orchestra answered 1 year ago
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