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Past Data Indicates an 80% (0

Question 57

Multiple Choice

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%?


A) 7
B) 2
C) 1.75
D) -1.75

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