A researcher surveyed 1500 people in a national random sample and found that 53% of the voters surveyed reported they will vote for Barack Obama. She claims that she is 68% confident that the population mean will be between 51% and 55%. This means the confidence level would be ________

a. 68%
b. 4%
c. 95%
d. between 51% and 55%

a

Communication & Mass Media

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