What Determines the Decision of Whether to Use a One-Tailed

Multiple Choice

What determines the decision of whether to use a one-tailed test or a two-tailed test when testing hypotheses to make inferences about a population mean?

A) the sample size and the estimated standard error
B) the nature of the situation and what the researcher is trying to demonstrate
C) the level of significance of the test
D) the sample size relative to the population size
E) the standard error relative to the sample variance