# Resolved: what is the formula for calculating standard error ?

What is the formula for calculating standard error (std. dev / square root of n) or (std. dev^2/square root of n). In one of the exercises related to calculation of confidence interval [Section 4: 2_Population variance known, z-score] the standard error is calculated as Population standard deviation / square root of n, however I remember from the course that the standard error is calculated as Std. Dev^2 / square root of n.

1 answers ( 1 marked as helpful)

Hello Barun,

It is the first one: std. dev / square root of n;

Where in the course do we how Variance over Square root of n, please?

Best,

Ned