more than one answer could be correct

What statements are true in a hypothesis test when testing the equality of population means: C] The F test is always considered as 2tailed D The 2 types of hypothesis testing (twotails and onetail) have the same null hypothesis [HO], that the population means are different unless there is enough evidence against it. D Onetail hypothesis tests are less demanding than twotails hypothesis tests. That is, to reject the null hypothesis we need the differences between the means to be less evident. D Independent or paired tests of hypothesis can be onetail or twotails