A medical center is interested in studying the impact an electronic medication information system could have on the percentage of patients who experience an adverse drug reaction (ADE) due to inadvertently prescribed medications that are not supposed to be taken at the same time.Currently 40% of patients experience an ADE, and administrators hope the new system will reduce this to 30%.Administrators plan to implement the new system and analyze a random sample of patient records to determine if the percentage has decreased. As it is expensive and very time-consuming to analyze the patient records, they would like to use as small a sample as possible in order to have a statistical power of at least 80%. Is a sample of 200 patients enough?