If a researcher changes from the 90% confidence level to the 95% level, the confidence interval will________.
A) widen.
B) decrease in width.
C) not be affected.
D) widen only if N is greater than 100.

Question

Quizplus · Accepted Answer

When a researcher changes from the 90% confidence level to the 95% level, the confidence interval will widen. This is because a higher confidence level requires a larger margin of error, which results in a wider interval. The sample size (N) does not affect the relationship between the confidence level and interval width.

If a Researcher Changes from the 90% Confidence Level to the 95