Hypothesis Testing - z score

Past data indicates an 80% (0.8) success rate in treating a certain medical problem. A new treatment is used on 100 patients in a clinical trial. It is successful in 87% (0.87) of the cases. What is the value of the z-score that can be used to test the null hypothesis that the success rate is 80%?

Solution Summary

Solution shows the value of the z-score that can be used to test the null hypothesis that the success rate is 80%.