Draw a conclusion about the population proportion based on the test- statistic value and the rejection region. A study believes that 70% of adults in the Philippines own a cellphone. A cellphone manufacturer believes that the actual number is much less than 70%. 100 Filipino adults were surveyed, of which 74 have cellphones. Using a 5% level of significance, is the cellphone manufacturer’s claim valid or not? CLAIM: EVIDENCE: REASONING:

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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.