Standard error of the mean
Standard error of the mean: use observations. Review the formula, worked example and calculation steps.
Inputs
Use the units shown—
Enter your values and select Calculate.
Formula & explanation
SE = sample standard deviation / √n
Variables & units
- Observations
- comma separated
Worked example
For 1,2,3 the sample standard deviation is 1 and SE is 1/√3.
Assumptions
Assumes independent observations. Standard error is different from the spread of individual values.
Formula version 1.0.0. JavaScript floating-point arithmetic applies. Results display up to 6 decimal places; stored values retain available precision. Use the units shown.
Practice with an example
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