Confidence Interval

Calculate confidence intervals for means and proportions

Confidence Interval Calculator

Calculate confidence intervals for means, proportions, and differences of means

Sample Mean

Sample Std Dev

Sample Size (n)

50.000000

Point Estimate

3.734061

Margin of Error

2.0452

1.825742

Std Error

95% Confidence Interval

[46.265939, 53.734061]

Formula

CI = x-bar +/- t*(s/sqrt(n)) = 50 +/- 2.0452 * (10/sqrt(30))