In the construction of confidence intervals, if all other quantities are unchanged, an increase in the sample size will lead to a ________ interval.
A) narrower
B) wider
C) less significant
D) biased

Question

Quizplus · Accepted Answer

An increase in the sample size will decrease the standard error, which means the interval will be narrower. Therefore, Choice A is correct.

In the Construction of Confidence Intervals, If All Other Quantities