Question

A sample of n = 9 scores has a variance of s2 = 36. what is the estimated standard error for the sample mean? 1 2 4 16

Answer 1

Given:
σ² = 36, the variance
n = 9, the sample size.

The standard deviation is 
σ = 6

By definition, the standard error is
σ/√n = 6/3 = 2

Answer:  2