After computing a confidence interval, the user believes the results are meaningless because the width of the interval is too large. Which one of the following is the best recommendation?
A)Increase the level of confidence for the interval.
B)Decrease the sample size.
C)Increase the sample size.
D)Reduce the population variance.

Question

Quizplus · Accepted Answer

Increasing the sample size will decrease the standard error of the mean, which in turn will narrow the confidence interval. Therefore, increasing the sample size is the best option to reduce the width of the confidence interval.

After Computing a Confidence Interval, the User Believes the Results