Free Margin of Error from Confidence Interval Calculator - Given a confidence interval, this determines the margin of error and sample mean.

This calculator has 1 input.

This calculator has 1 input.

Interval Size = x_{2} - x_{1}

Margin of Error = ±Interval Size/2

For more math formulas, check out our Formula Dossier

Margin of Error = ±Interval Size/2

For more math formulas, check out our Formula Dossier

- 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