Confidence Interval Calculator

100% Free online Confidence Interval Calculator. Input your sample data, pick a confidence level, and this calculator will handle the rest automatically.

About Confidence Interval Calculator

What is Confidence Interval?

In statistics, a confidence interval is a range of values that are calculated using statistics. This range represents the uncertainty in the estimate of a population parameter. The confidence interval tells us how confident we can be that the true value of the population parameter lies within this range.

How to use the Confidence Interval Calculator

To use this calculator, simply input the Sample Mean, Sample Size, Standard Deviation and pick a Confidence Level. Then click on calculate. The calculator will automatically calculate and give you an instant result. You will get the lower bound, upper bound, and margin of error.

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