Question

A random sample of size n = 8 has the sample mean x- = 41.89 and standard deviation sx = 2.45.

Answer 1

0.87

Explanation:

standard error SE formula = σ/√n

where σ is the standard deviation and n is size of the sample.

SE = σ/√n = 2.45/√8

= 0.866

= 0.87 to 2 decimal places