A research center conducted a telephone survey of 2,000 adults to learn about the major economic concerns for the future. The survey results showed that 1,780 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? (Round your answer to four decimal places.)   (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. (Round your answer to four decimal places.)   (d) Develop a 95% confidence interval for this population proportion. (Round your answer to four decimal places.)

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.