Question

When sample size increases Group of answer choices

Confidence interval decreases
Confidence interval remains the same
Confidence interval increases
Standard deviation of the sample mean increases

Answer 1

Option A)

Confidence interval decreases

Explanation:

If we increase the sample size, then,

• The standard error of the interval decrease.
• If the standard error increase, the margin of error of the interval decrease.
• If the margin of error decreases, the width of the confidence level decreases, hence, the confidence interval become narrower.

Thus, the correct answer is

Option A)

Confidence interval decreases