If you wish to construct a confidence interval estimate for the difference between two population means, what would an increase in the sample sizes used result in?
A) a decrease in the critical value z
B) a narrower confidence interval
C) a wider confidence interval
D) a confidence interval that contains 0

Question

Quizplus · Accepted Answer

Increasing the sample sizes results in a decrease in the standard error, which makes the confidence interval narrower.

If You Wish to Construct a Confidence Interval Estimate for the Difference