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One of the questions on a survey of 1,000 adults asked if today's children will be better off than their parents (Rasmussen Reports website, October 26, 2012). Representative data are shown in the WEBfile named ChildOutlook. A response of Yes indicates that the adult surveyed did think today's children will be better off than their parents. A response of No indicates that the adult surveyed did not think today's children will be better off than their parents. A response of Not Sure was given by 23% of the adults

a. What is the point estimate of the proportion of the population of adults who do think that today's children will be better off than their parents (to 2 decimals)?

b. At 95% confidence, what is the margin of error (to 4 decimals)?

c. What is the 95% confidence interval for the proportion of adults who do think that today's children will be better off than their parents (to 4 decimals)?

d. What is the 95% confidence interval for the proportion of adults who do not think that today's children will be better off than their parents (to 4 decimals)?

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