Question: A sample statistic and margin of error are given. Find the confidence interval likely to contain the population parameter of interest and answer the question.

A sample statistic and margin of error are given. Find the confidence interval likely to contain the population parameter of interest and answer the question.

Following the Republican National Convention, a poll of voters in a Central Illinois community showed that 57.9% would choose the Republican ticket to win over the Democrat ticket no matter whom the Democrats chose for vice-president. The margin of error was

4.8 percentage points. Should the Democrats expect to lose Central Illinois?

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