Suppose a 95% Confidence Interval for Turns Out to Be

Multiple Choice

Suppose a 95% confidence interval for turns out to be (1,000, 2,100) .To make more useful inferences from the data, it is desired to reduce the width of the confidence interval. Which of the following will result in a reduced interval width?

A) Increase the sample size.
B) Increase the confidence level.
C) Increase the population mean.
D) Increase the sample mean.