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In a Pew Research Center poll of 745 randomly selected adults, 589 said that it is...

In a Pew Research Center poll of 745 randomly selected adults, 589 said that it is morally wrong to not report all income on tax returns.


a.   Construct a 95% confidence interval estimate of the percentage of all adults who have that belief, and then write a statement interpreting the confidence interval.
   76.1% - 82%
b.   Assume that you must conduct a new poll to determine the percentage of adults who believe that it is morally wrong to not report all income on tax returns. How many randomly selected adults must you survey if you want 99% confidence that the margin of error is two percentage points?
   ?
c.   Use the point estimate percentage from a.
?

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