A Random Sample of Registered Voters Is Selected from Each $X^2$

Short Answer

A random sample of registered voters is selected from each of the three major areas of a western city. Those in the samples are asked for their preferences among three candidates for mayor.
(a)State (in words) the null hypothesis of independence for this situation in terms of proportions.
(b)Perform the $X^2$ test of independence $(\alpha = .05)$ and draw conclusions.
(c)Do your results from (b) prove that voter preference is unrelated to area of the city? Explain.