Given a confidence interval, this determines the margin of error and sample mean.

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- Interval Size = x
_{2}- x_{1} - Margin of Error = ±Interval Size/2

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- confidence interval
- a range of values so defined that there is a specified probability that the value of a parameter lies within it.
- margin of error
- a statistic expressing the amount of random sampling error in the results of a survey.

σ_{p}+ z-score - mean
- A statistical measurement also known as the average