You calculate a confidence interval and determine that it is

You calculate a confidence interval and determine that it is too wide. What are two things that you could adjust to narrow the confidence interval? Explain your answer using complete sentences

Solution

We can reduce the width by increasing the sample size, as increasing sample size reduces the standard error, which reduces the width of the confidence interval.

Another thing is to reduce the confidence level. That way, we reduce the critical z (or t), which reduces the wdith as well.