If a decision maker wishes to reduce the margin of error associated with a confidence interval estimate for a population mean, she can:
A) decrease the sample size.
B) increase the confidence level.
C) increase the sample size.
D) use the t-distribution.

Question

Quizplus · Accepted Answer

Increasing the sample size reduces the margin of error in a confidence interval estimate because it provides a more accurate representation of the population, thereby decreasing the standard error of the mean.

If a Decision Maker Wishes to Reduce the Margin of Error