Chapter1: Making Economics Decisions
Section: Chapter Questions
Problem 1QTC
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Question
Country Financial, a financial services company, uses surveys of adults age 18 and older to determine if personal financial fitness is changing over time (USA Today, April 4, 2012). In February 2012, a sample of 1000 adults showed 410 indicating that their financial security was more than fair. In February 2010, a sample of 900 adults showed 315 indicating that their financial security was more than fair.
- State the hypotheses that can be used to test for a significant difference between the population proportions for the two years.
- What is the sample proportion indicating that their financial security was more than fair in 2012? In 2010?
- Conduct the hypothesis test and compute the p-value. At a .05 level of significance, what is your conclusion?
- What is the 95% confidence interval estimate of the difference between the two population proportions?
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