The width of a confidence interval will be
A) narrower for 98 percent confidence than for 90 percent confidence.
B) wider for a sample size of 64 than for a sample size of 36.
C) wider for 99 percent confidence than for 95 percent confidence
D) narrower for a sample size of 25 than for a sample size of 36.
E) None of the other choices is correct.

Question

Quizplus · Accepted Answer

A higher confidence level (e.g., 99% vs. 95%) results in a wider confidence interval because it requires more certainty, thus a larger margin of error.

The Width of a Confidence Interval Will Be