A certain university claims that for the last school year the proportion of students who were not able to earn a college diploma is at most 25%.  What is the null hypothesis? a. Proportion is greater than or equal to 0.25. b. Proportion is less than or equal to 0.25. c. Proportion is equal to 0.25. d. Proportion is not equal to 0.25.

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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.