In: Statistics and Probability
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 of 2012, a sample of 1000 adults showed 410 indicating that their financial security was more than fair. In February of 2010, a sample of 900 adults showed 315 indicating that their financial security was more than fair.
What is the point estimate of the difference between the proportions at the two years, 2012 and 2010 ? Round to 2 decimal places.
At 99% confidence, what is the margin of error? Round to 2 decimal places.
What is a 99% confidence interval estimate of the difference between the proportions at the two years, 2012 and 2010?
At 95% confidence, what is the margin of error? Round to 2 decimal places.
What is a 95% confidence interval estimate of the difference between the proportions at the two years, 2012 and 2010?