Response to the question "Would you vote for the Blue Party?" by Income Level. Income Level Definitely Yes Definitely No Undecided Total Highest 33 1/3% 32 52 68 152 (* *) (53.0) (52.6) Middle 33 1/3 % 84 90 88 262 (80.1) (91.3) (90.6) Lowest 33 1/3 % 135 144 128 407 (124.4) (141.8) (140.8) 251 284 Chi Square= 4.52 + 0.02+ 4.51+ 0.19+ 0.02 + 0.07+ 0.90 + xxx + 1.16 = If the investigator used a significance level of 5% for the test of independence and obtained the result shown below the table, the correct decision would be to: O a. reject Ho and conclude that the voting decision is not independent of income level O b. reject Ho and conclude that the voting decision is independent of income level O c. fail to reject Ho and conclude that the voting decision is independent of income level O d. fail to reject Ho and conclude that the voting decision is not independent of income level