Sandra's marketing firm randomly selects 2500 adults living in the tri-state area, and asks each of them whether they percieve the new advertising campaign favorably or unfavorably. Of those sampled, 1272 responsed favorably. Do the sample data indicate signifcant evidence that the majority of all adults living in the tri-state area view the advertising campaign favorably? Test this claim at the 0.05 significance level.

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2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.