Standard Error Calculator

Calculate the standard error of the mean, which measures how much the sample mean varies from sample to sample.

Standard Error

3.000000

Variance of the Mean9.0000
Relative SE (as % of SD)20.0000

Standard Error vs Standard Deviation

सूत्र देखें →

सूत्र

## How to Calculate the Standard Error ### Formula **SE = sigma / sqrt(n)** The standard error of the mean measures the precision of the sample mean as an estimator of the population mean. It is the standard deviation of the sampling distribution of the mean. As sample size increases, SE decreases, making estimates more precise.

हल किया गया उदाहरण

Population SD = 15, sample size = 25. What is the standard error?

  1. 01SE = sigma / sqrt(n)
  2. 02SE = 15 / sqrt(25)
  3. 03SE = 15 / 5 = 3
  4. 04Variance of mean = 15^2 / 25 = 225 / 25 = 9