9.6 A recent poll found that 60 percent of Americans support raising taxes on incomes above $250,000. The details for the poll results stated that the "margin of sampling error is plus or minus 3.5 percentage points." a. Calculate the 95% confidence interval for support for that policy. b. Interpret the 95% confidence interval in words. c. A prior poll had shown 55 percent of Americans supporting the policy. Are the results of the recent poll (60%) statistically significantly different from the prior poll results (55%)? d. Express the change in the results between the prior poll and the current poll in two different ways. e. The poll also broke down the policy support results by region of the country. Explain how the margin of error would differ for the results for just the Midwest and why