What Margin of Error is: The amount the results from a sample deviate from the population as a whole. The smaller the margin of error, the more confident you can be in the reported results.
What Margin of Error is not: Confidence level, which tells you how sure you can be about your results
Why Margin of Error matters: An analysis of an experiment will treat any number within the margin of error as the estimated value of the population. Therefore, within the margin of error, you will not be able to detect a difference between a sample value and the true population value.
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