Suppose the researchers want to test to see if there is a meaningful difference in mean RDI levels between male and female patients with traumatic brain injuries. What are the appropriate hypotheses to test? The following multiple-choice options contain math elements, so you may need to read them in your screen reader's "reading" or "browse" mode instead of "forms" or "focus" mode. Choice 1 of 4: H 0 : 1 = 2 H 0 : 1 = 2 vs H a : 1 2 H a : 1 = 2 Choice 2 of 4: H 0 : x 1 x 2 = 0 H 0 : x 1 x 2 =0 vs H a : x 1 x 2 0 H a : x 1 x 2 =0 Choice 3 of 4: H 0 : 1 = 2 H 0 : 1 = 2 vs H a : 1 > 2 H a : 1 > 2 Choice 4 of 4: H 0 : x 1 = x 2 H 0 : x 1 = x 2 vs H a : x 1 > x 2 H a : x 1 > x 2