Confidence Interval Calculator
Use this confidence interval calculator to Estimate a confidence interval around a sample mean.
Confidence Interval Calculator workspace
Estimate a range around a sample mean.
Result will appear here.
Enter the values and calculate to see the answer, formula context, and learning note.
Formula used
Mean ± z × (SD ÷ √n)
This formula is shown so learners can understand the statistical method instead of only copying the answer.
Education note
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