A simple random sample of 100 items from a population with $σ=8$ has a standard error of mean :
Answer & explanation
Correct answer: option 3
Given population standard deviation $\sigma=8$ and sample size $n=100$.
Standard error of mean:
$SE=\frac{\sigma}{\sqrt{n}}$
$SE=\frac{8}{\sqrt{100}}$
$SE=\frac{8}{10}=0.8$
final answer: $0.8$