Standard Error Calculator

Standard Error of the Mean (from data)

Standard Error (SE)
3.30
27.00
Sample Mean
10.42
Standard Deviation
10
Sample Size (n)
SE = σ / √n

Standard Error (from summary stats)

1.50
Standard Error

Standard Error of Proportion

0.025
SE of Proportion
SE(p) = √[p(1-p)/n]

Confidence Intervals (based on data above)

21.57 - 32.43
90% CI
20.54 - 33.46
95% CI
18.51 - 35.49
99% CI