Posted by Nick on .
We have calculated a 95% confidence interval for a proportion and would prefer the confidence interval to be more precise, that is narrower. Using the same sample, we can narrow the confidence interval using which of the following?
A) increasing the confidence level
B) decreasing the confidence level
C) It's impossible to narrow the interval without increasing the sample size.
D) unable to answer with the given information
Is B the correct answer?