You may need to Three admission test preparation programs are being evaluated. Suppose the scores obtained by a sample of 20 people who used the programs provided the following data. Program B C 530 450 600 400 530 620 470 400 590 520 440 470 470 490 570 640 360 610 550 560 Use the Kruskal-Wallis test to determine whether there is a significant difference among the three test preparation programs. Use a = 0.05. State the null and alternative hypotheses. O Ho: Median = Mediang = Medianc H: Median > Mediang