When constructing a confidence interval, an increase in sample size will:
A)increase the margin of error and increase the standard error
B)increase the margin of error and decrease the standard error
C)decrease both the margin of error and the standard error
D)increase both the margin of error and the standard error
E)will have no effect on the confidence interval

Question

Quizplus · Accepted Answer

Increasing the sample size decreases both the margin of error and the standard error, making the confidence interval narrower and more precise.

When Constructing a Confidence Interval, an Increase in Sample Size