Let’s suppose that in the U.S. population, 20% of people make more $100,000 a year. We would like to see if it is higher than this for graduates. The null and alternative hypotheses would then be H0 : u <= 0.2 Ha: > 0.2 In a survey given to a sample of graduates, we find that 38 out of 200 earned more than $100,000. What is the associated p-value of the test? a. 0.6368 b. 0.0576 c. 0 d. 0.3632

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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.