One way to reduce the margin of error in a confidence interval estimate is to lower the level of confidence.

Question

Quizplus · Accepted Answer

Lowering the level of confidence decreases the width of the confidence interval, thereby reducing the margin of error. This is because a lower confidence level means you are accepting a higher probability that the true parameter will not be captured by the interval, allowing the interval itself to be narrower.

One Way to Reduce the Margin of Error in a Confidence