This standard error reference table shows the standard error of the mean for a range of standard deviation values, assuming a sample size of 30. Every figure is computed with the same engine that powers our Standard Error Calculator, so the numbers are exact.
| Standard deviation | Standard error of the mean |
|---|---|
| 3.8 | 0.6938 |
| 7.5 | 1.3693 |
| 11 | 2.0083 |
| 15 | 2.7386 |
| 23 | 4.1992 |
| 30 | 5.4772 |
| 45 | 8.2158 |
| 75 | 13.6931 |
| 110 | 20.0832 |
| 150 | 27.3861 |
How to use this table
Find the row closest to your standard deviation and read across to the standard error of the mean. For a value between two rows, the real figure sits between them — or enter your exact numbers in the Standard Error Calculator for a precise answer.
Need a value that is not in the table? — the Standard Error Calculator does it instantly, for free, with the formula and a worked example built in.
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