After constructing a confidence interval estimate for a population mean, you believe that the interval is useless because it is too wide. In order to correct this problem, you need to:
A) increase the population size
B) increase the sample mean
C) increase the confidence coefficient
D) increase the sample size
E) decrease the sample size

Question

Quizplus · Accepted Answer

The width of a confidence interval is determined by the sample size, so increasing the sample size will result in a narrower interval. Therefore, increasing the sample size is the best option to correct the problem of a confidence interval being too wide.

After Constructing a Confidence Interval Estimate for a Population Mean