What will reduce the width of a confidence interval?
Understand the Problem
The question is asking about factors that can lead to a narrower confidence interval in statistics. This might involve discussing sample size, confidence level, or variability among data points.
Answer
Increasing the sample size and decreasing variance
The final answer is increasing the sample size and decreasing variance.
Answer for screen readers
The final answer is increasing the sample size and decreasing variance.
More Information
Increasing the sample size reduces the standard error, which in turn narrows the confidence interval. Decreasing variance also has the effect of narrowing the confidence interval.
Tips
A common mistake is to think that increasing the confidence level will narrow the interval, but it actually widens it.
Sources
- STS 101 - Confidence Intervals - .stat.duke.edu
- Solved Question 2 What will reduce the width of a confidence - Chegg - chegg.com
- Ways to get a more precise confidence interval - Minitab - support.minitab.com
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