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 μ is used.
B)a one-tail test for μ 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 μ is used. 
B)a one-tail test for μ 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 for μ is used when the null hypothesis is that the true population mean is equal to a hypothesized value, and the alternative hypothesis is that the true population mean is not equal to the hypothesized value. This is equivalent to constructing a confidence interval estimate for the population mean and checking whether the hypothesized value falls within the interval. Therefore, the results of a confidence interval estimate can be directly compared to the results of a two-tail test for μ.

It Is Possible to Directly Compare the Results of a Confidence