General Hospital has been selected to test the effectiveness of a drug to treat bi-polar disorder. Recent studies have shown that the drug is effective to 83% of patients who were administered the drug. You are the director of research at the hospital and you have been asked by the CDC to conduct a test of your patients by administering the drug, to selected patients, and determining effectiveness based on a plan provided by the CDC Assume you select 137 patients for the study who were administered the drug to treat bi-polar disorder. The drug was effective on 106 out of the 137 patients. To conclude the study, you are to conduct a hypothesis test at a level of significance of .05. Does the study meet the criteria of recent studies (83%)?

1. What is the Critical T or Z value ?

2. State the null Hypothesis ?

3. Calculated T or Z is... ?

4. Accept or reject Null Hypothesis?

Problem Data is below

Recent study effectiveness: 83%

Number of Patients: 137

Number affective: 106