A large group of college students was surveyed and the following information was obtained: 712 saw Lady Gaga 624 saw Arcade Fire 381 saw Skrillex 111 saw all three 513 saw none 240 saw only Lady Gaga 377 saw Lady Gaga and Arcade Fire 117 saw Arcade Fire and Skrillex but not Lady Gaga. What percentage saw at least one of the artists? What percentage saw exactly one of the artists?

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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.