After constructing a 95% confidence interval for a population mean μ, you decide that the interval is too wide to be of any value.To correct this problem, you need to:
A) increase the population size.
B) increase the confidence level.
C) increase the sample mean.
D) increase the sample size.

Question

Quizplus · Accepted Answer

Increasing the sample size will decrease the width of the confidence interval. This is because larger sample sizes provide more precise estimates of the population mean, which reduces the variability in the estimate and results in a narrower confidence interval. A larger population size, a higher confidence level, or an increase in the sample mean would have no effect on the width of the confidence interval.

After Constructing a 95% Confidence Interval for a Population Mean