In developing a confidence interval estimate for the difference between two population means when the population variances are known, a decrease in the difference will result in:
A) a wider confidence interval.
B) a narrower confidence interval.
C) a smaller z critical value.
D) the same confidence interval of the same width.

Question

In developing a confidence interval estimate for the difference between two population means when the population variances are known, a decrease in the difference  will result in:
A) a wider confidence interval. 
B) a narrower confidence interval. 
C) a smaller z critical value. 
D) the same confidence interval of the same width.

Quizplus · Accepted Answer

The Answer of In developing a confidence interval estimate for the difference between two population means when the population variances are known, a decrease in the difference  will result in:
A) a wider confidence interval. 
B) a narrower confidence interval. 
C) a smaller z critical value. 
D) the same confidence interval of the same width.

In Developing a Confidence Interval Estimate for the Difference Between