Standard Error Calculator
The standard error of the mean: standard deviation ÷ √n.
Result
Standard error
2.7386
How it works
SE = SD ÷ √n
The standard error estimates how much a sample mean would vary from sample to sample. It shrinks as the sample size grows.
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Frequently asked questions
SD vs standard error?
SD measures spread of the data; standard error measures spread of the sample mean.
How do I reduce it?
Increase the sample size — the standard error falls with the square root of n.
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