Assignment:
The Consumer Reports National Research Center conducted a telephone survey of 2000 adults to learn about the major economic concerns for the future ( Consumer Reports. January 2009). The survey results showed that 1760 of the respondents think the future health of Social Security is a major economic concern.
a. What is the point estimate of the population proportion of adults who think the future health of Social Security is a major economic concern.
b. At 90% confidence. what is the margin of error?
c. Develop a 90% confidence interval for the population proportion of adults who think the future health of Social Security is a major economic concern.
d. Develop a 95% confidence interval for this population proportion.
Provide complete and step by step solution for the question and show calculations and use formulas.