Standard Error Calculator
Find the standard error from standard deviation and sample size.
CALCULATE
--
Formulas
SE = σ / √nStandard error decreases as sample size increases (by square root).
Standard Error
Measures precision of a sample mean estimate. To halve the SE, quadruple the sample size. SE of 15/√30 = 2.74. With n=120: SE = 1.37.
Ad (728x90)