Confidence Interval Calculator March 6, 2025 | web-tools | Calculator Confidence Interval Calculator Sample Mean (x): Sample Size (n): Standard Deviation (s): Confidence Level: 90% (Z = 1.645) 95% (Z = 1.96) 99% (Z = 2.576) 99.9% (Z = 3.290527) Calculate Confidence Interval Enter values and click calculate.
