Question 12 12 pts X - H IX Z= t = - t= Ox SDx2 + SDy t = SDD E C OX = - df = n-1 df = n1 + 2- 2 df = n-1 Regarding the data from number 11 above, test for differences? Use an alpha level of .05 and find the correct critical value and enter it in this box to the second decimal place. Crunch a calculated value and enter it in this box to the second decimal place. Then, make a decision about the null: A. I would fail to reject the null B. I would accept the null C. I would reject the null Enter the letter of your choice into this box: Question 13 5 pts