QSR Magazine published the latest results of it’s annual quick-serve restaurant drive-thru study. One aspect of the study examined how accurate various brands were in fulfilling drive-thru orders. This year, Burger King accurately filled 123 of the 136 randomly selected drive-thru orders, and Carl’s Jr. accurately filled 115 of the 119 randomly selected drive-thru orders. Based on the results obtained in this study and a 5% level of significance, would QSR Magazine be justified in publishing that Carl’s Jr. is better than Burger King at accurately fulfilling drive-thru orders?

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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.