Which is true about a 95% confidence interval based on a given sample?
I. The interval contains 95% of the population.
II. Results from 95% of all samples will lie in the interval.
III. The interval is narrower than a 98% confidence interval would be.
A) II and III only
B) II only
C) none of these
D) III only
E) I only

Question

Quizplus · Accepted Answer

A 95% confidence interval is narrower than a 98% confidence interval because a higher confidence level requires a wider interval to ensure the same level of certainty.

Which Is True About a 95% Confidence Interval Based on a Given