1. The following table summarizes data collected in a study to evaluate a new screening test for ovarian cancer. A total of 200 women were involved in the study - 50 had ovarian cancer and 150 did not. The results are tabulated below. Ovarian Cancer Free of Ovarian Cancer 23 127 150 Screening Test 28 22 Positive Negative 50 a. Find the sensitivity of the screening test and interpret the result. b. Find the specificity of the screening test and interpret the result.

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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.