If a manager wishes to develop a confidence interval estimate for estimating the difference between two population means,an increase in the size of the samples used will result in:
A)an increase in the size of the critical value.
B)a wider confidence interval.
C)a more precise confidence interval.
D)a less precise confidence interval

Question

Quizplus · Accepted Answer

Increasing the sample size will decrease the standard error, and therefore increase the precision of the confidence interval. This will result in a narrower confidence interval, not a wider one. The critical value is based on the level of confidence desired and is not affected by the sample size.

If a Manager Wishes to Develop a Confidence Interval Estimate