In the Last Presidential Election Before the Candidates Began Their

In the last presidential election before the candidates began their major campaigns, the percentages of registered voters who favored the various candidates were as follows: $$\begin{array}{l}\text { Registered Voters } \quad \text { Percentages }\\\begin{array} { l l } \text { Republicans } & 34 \\\text { Democrats } & 43 \\\text { Independents } & 23\end{array}\end{array}$$ After the major campaigns began, a random sample of 400 voters showed that 172 favored the Republican candidate, 164 were in favor of the Democrat candidate, and 64 favored the Independent candidate. Use α = .01 to determine if the proportion of voters who favored the various candidates changed.