A confidence interval increases in width as
A)The level of confidence increases.
B)n decreases.
C)s increases.
D)All of these.

Question

Quizplus · Accepted Answer

A confidence interval is directly proportional to the level of confidence, sample size (n), and standard deviation (s). Therefore, as the level of confidence increases, n decreases or s increases, the width of the confidence interval also increases. Thus, all options (A, B, and C) are correct, and the best answer is D.

A Confidence Interval Increases in Width as