1. Age distribution of 70 clients with renal problem who has visited Internal Medicine Department, Black Lion Hospital, Addis Ababa, 2012. Class interval FD CFD RF CRF 18 - 22 11 23 – 27 8 28 – 32 15 33 – 37 13 38 – 42 14 43 - 47 9

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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.