8.82      (a) A poll of 2,277 voters throughout Britain on the proposed EU constitution would have approximately what margin of error? (b) The poll showed that 44 percent opposed Britain’s signing the proposed constitution. Construct a 90 percent confidence interval for the true propor- tion opposed to signing it. (c) Would you say that the percentage of all voters opposed could be 50 percent? Explain. (Data are from The Economist 268, no. 8331 [July 5, 2003], p. 30.)

8.83      To determine the proportion of taxpayers who prefer filing tax returns electronically, a survey of 600 taxpayers was conducted. Calculate the margin of error used to estimate this proportion. What assumptions are required to find the margin of error?

 

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