Exhibit 12-6
the Following Shows the Number of Individuals in a Sample

Essay

Exhibit 12-6
The following shows the number of individuals in a sample of 300 who indicated they support the new tax proposal.
We are interested in determining whether or not the opinions of the individuals of the three groups are uniformly distributed.
-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:
After the major campaigns began, a random sample of 400 voters showed that 172 favored the Republican candidate; 164 were in favor of the Democratic candidate; and 64 favored the Independent candidate. Test with $\alpha$ = .01 to see if the proportion of voters who favored the various candidates changed.