22. In a study examining the relationship of coffee drinking and heart problems, the researcher reported that among 100 patients he studied from 5 area hospitals, those patients for treatment of heart problems drank an average of 2.7 cups of coffee per day while those patients being treated for other problems averaged only 1.4 cups of coffee per day.  According to class, the variable "problem treated" in this scenario is which of the following type?  Group of answer choices interval nominal ratio ordinal

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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.