It is possible to directly compare the results of a confidence interval estimate to the results obtained by testing a null hypothesis if:
A) a two-tail test for $\mu$ is used.
B) a one-tail test for $\mu$ is used.
C) a two-tail test for Is used.
D) a one-tail test for Is used.

Question

It is possible to directly compare the results of a confidence interval estimate to the results obtained by testing a null hypothesis if:
A) a two-tail test for $\mu$ is used. 
B) a one-tail test for $\mu$ is used. 
C) a two-tail test for Is used. 
D) a one-tail test for Is used.

Quizplus · Accepted Answer

A two-tail test is used when comparing a confidence interval estimate to a null hypothesis test, as it considers both directions of deviation from the null hypothesis, aligning with the range provided by a confidence interval.

It Is Possible to Directly Compare the Results of a Confidence