According to a 2013 study by the Pew Research Center, 15% of adults in the United Statesdo not use the Internet (Pew research Center website, December, 15, 2014). Suppose that10 adults in the United States are selected randomly.a. Is the selection of the 10 adults a binomial experiment? Explain.b. what is the probability that none of the adults use the Internet?c. what is the probability that 3 of the adults use the Internet?

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Q: Do you own a cell phone? Yes No Total 12 77 404 481 Grade 11 16 122 138 Total 93 526 619

A:

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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.