1.scoring higher on research methods exams. You test your study technique with the design diagramed below. Where: R=random assignment O=observation on the dependent variable X= the independent variable R O1 X O2 R O3 O4 Using the diagramed design, what are your predictions? Group of answer choices O2 should be greater than O1 the (O2-O1) change should be greater than the (O4-O3) change O4 must equal O3 O2 should be greater than O1, the (O2-O1) change should be greater than the (O4-O3) change and O4 must equal O3 O2 should be greater than O1, and the (O2-O1) change should be greater than the (O4-O3) change