Saturday

April 19, 2014

April 19, 2014

Posted by **Bill** on Tuesday, March 26, 2013 at 8:58pm.

A. Calculate a 95% confidence interval to estimate the true proportion of Americans who are currently satisfied with the direction the U.S. is heading .

B. If in the future the polling organization wanted to conduct a 99% confidence interval to estimate the true proportion of Americans who are currently satisfied with the direction the U.S. is heading and have the margin of error to be no larger than 3%, how many Americans should be included in the survey.

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