An 80% confidence interval will be twice as wide as a 40% confidence interval.

Question

Quizplus · Accepted Answer

The width of a confidence interval is determined by the level of confidence and the variability in the data, not by a direct proportional relationship. Increasing the confidence level generally increases the width of the interval, but not in a manner where an 80% confidence interval would be exactly twice as wide as a 40% confidence interval.

An 80% Confidence Interval Will Be Twice as Wide as a 40