A researcher claims that the percentage of infants who receive immunizations is less than 80%. She selects a sample of size 750 infants and 573 have received immunizations. a. State the hypotheses to be tested. b. Compute the value of the test statistic (z-value). Show work.

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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.