TabLab

Confidence Interval Calculator

Calculate confidence intervals for population means. Estimate population parameters with specified confidence levels using sample data.

Confidence interval results

Sample mean:

25.3000

Standard error:

0.4726

Confidence level:

95.0%

Sample size:

10

Confidence interval:

25.3000 ± 1.0691
(24.2309 to 26.3691)

Interpretation:

We are 95.0% confident that the true population mean falls between 24.2309 and 26.3691.

Sampling distribution

How to Use the Confidence Interval Calculator

  1. Enter your sample data
  2. Select a confidence level (90%, 95%, or 99%)
  3. View the calculated confidence interval
  4. Interpret the results with provided explanations
  5. Visualize the sampling distribution

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Normal Distribution Calculator

Calculate probabilities and z-scores for normal distributions. Perfect for statistical analysis and probability calculations.

by @scottpaulin