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2) Your cousin Drippy wants to know the percent of Americans who can correctly identify the Washington, DC as the capital. Assume that he
2) Your cousin Drippy wants to know the percent of Americans who can correctly identify the Washington, DC as the capital. Assume that he wants to be 95% confident that the sample percentage is within two percentage points of the true population percentage. a. Calculate the need sample size if a previous study suggests that 95% of Americans can identify the capital correctly. b. Calculate the need sample size if no estimate of the percentage of Americans that can identify the capital correctly is available.
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