Answer: option B
Explanation: The sampling error also known as the marginal error is given mathematically as
Margin of error = critical value × (standard deviation/√n)
Where n = sample size
As we can see from this formulae, the only variable here is the margin of error and the sample size.
Hence margin of error = k/√n
Which implies that there is an inverse relationship between margin of error and sample size.
A large sample size gives a low margin of error while a small sample size gives a large margin of error.
