Standard Error Calculator

Find the standard error of the mean.

Standard error 2.5

Formula: SE = SD ÷ √n

Step-by-step with your numbers:

1. Values used:

2. Standard deviation = 15

3. Sample size = 36

5. Standard error = 2.5

Did we solve your problem today?

Standard error estimates how much a sample mean varies from the true mean.

The math behind it

SE = standard deviation ÷ √(sample size). Bigger samples give smaller error.

SD 15, n 36 → SE 2.5.

Vs standard deviation?

SD describes data spread; SE describes the precision of the mean.