Confidence Interval Calculator

Confidence Interval for Population Mean (Known σ)

Sample Mean (x̄) Population Standard Deviation (σ) Sample Size (n) Confidence Level

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Note: Uses z-distribution.

Sample Mean (x̄) Sample Standard Deviation (s) Sample Size (n) Confidence Level

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Note: Uses t-distribution with n-1 degrees of freedom.

Sample Proportion (p̂) Sample Size (n) Confidence Level

Result will appear here.

Note: Uses z-distribution for proportions.