A bond issue is to be put before the voters in a forthcoming election. An opinion poll company ...

      #2. A bond issue   is to be put before the voters in a forthcoming election. An opinion poll company obtains a random   sample of 240 registered voters and asks them what party they belong to and   how they intend to vote on the bond issue. The results are as follows:            YES NO UNDECIDED    DEMOCRATS 80 20 30    REPUBLICANS 30 60 20           (a) Test the null   hypothesis at the .01 level that political party and prospective votes on the bond issue   are independent. What is your   conclusion?   (b) Explain the decision to   reject or retain the null hypothesis.