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August 28, 2015

Homework Help: statistical applications

Posted by cortez on Friday, May 28, 2010 at 9:21am.

In the media, numerous surveys are often displayed reporting percentages or proportions. A margin of error is often reported in the survey and this is used to calculate confidence intervals. Why is it important to create/report confidence intervals (CI) rather than just reporting the averages or proportions? is it better to use 95% confidence interval or 99% confidence interval?

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