In a statistical test, we have a choice of a left-tailed test, a right-tailed test, or a two-tailed test. Is it the null hypothesis or the alternate hypothesis that determines which type of test is used? Explain your answer. The null hypothesis because it specifies the region of interest for the parameter in question. The alternative hypothesis because it specifies the region of interest for the parameter in question. The alternative hypothesis because it specifies what the level of significance of the test will be. The null hypothesis because it specifies what the level of significance of the test will be