Suppose an opinion poll on a referendum in 4 city districts yields the following data: Yes No Undecided Total District 3 18 20 12 50 District 8 26 16 8. 50 District 11 20 24 6. 50 District 16 28 12 10 50 Total 92 72 36 200 Let H, be the hypothesis that the voter opinion on the referendum is homogeneous in the 4 districts. (a) Find the ? value. (b) Find the degrees of freedom (df). (c) Test H, at a= 0.10 significance level.

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