Cambridge Analytics  tracks favorite methods of  teen communications worldwide and reports the following:   Messaging apps 63.4% In person communications 13.1% Other 16.8% Phone calls  6.7%   1857 teens in NJ were polled to find their favorite ways to communicate.  Observed Messaging apps 966 In person communications 390 Other 136 Phone calls 260   Is there evidence that NJ teens are different than the teens worldwide?

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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.