Using the data below,suppose we focus on the proportions of patients who show improvement.Is there a statistically significant difference in the proportions of patients who show improvement between treatments 1 and 2. Run test at 5% level of significance.                      Symptoms worsened     No Effect   Symptoms Improved total        Treatment 1          22                            14                     14                          50 Treatment 2           14                           9                        21                          50 Treatment 3           9                             12                      29                         50

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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.