Question

Suppose a population has a mean weight of 180 pounds and a standard deviation of 25 pounds. a sample of 100 items is drawn from this population. what is the standard error of the mean?

Answer 1

Solution: We are given:

μ=180,σ=25,n=100

Therefore the standard error of the mean is

$\frac{standard deviation}{\sqrt{n}}$

$\frac{25}{\sqrt{100}}$

$2.5$