What proportion of the total number of ratings rec Customer Satisfaction Survey Monthly Regional Report the Southern Region are not Good? Ratings Received Por Acceptable Good North O 21% 90 220 690 South 120 520 1,360 East 60 27% 300 640 West 30 160 810 Central 80 440 980 32% O 40% O 47%

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A:

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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.