Confidence Interval Calculator
Compute confidence intervals for sample means (x̄ ± z* (s / √n)) at 90%, 95%, or 99% levels
Confidence Interval Calculator
Compute confidence intervals for sample means (x̄ ± z* (s / √n)) at 90%, 95%, or 99% confidence levels.
About Confidence Interval Calculator
Compute confidence intervals for sample means at 90%, 95%, or 99% confidence levels with margin of error.
How to Use Confidence Interval Calculator
- 1Enter sample mean x̄, sample std dev s, and sample size n.
- 2Select confidence level (90%, 95%, 99%).
- 3View lower bound, upper bound, and margin of error.
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