Nu-713 Final Exam Questions With Correct Answers 2024

Power {Ans: how good our study is at correctly identifying a difference between the therapies if in reality they are different}What is confounding? {Ans: In a study of whether factor A is a cause of disease B, we say that a third factor, factor X, is a confounder if the following are true: 1. Factor X is a known risk factor for disease B. 2. Factor X is associated with factor A, but is not a result of factor A.}What does case fatality measure? {Ans: the severity of the disease that causes death}Type II error (β error) {Ans: occurs when the null hypothesis is not rejected when the null hypothesis is false. In other words, there is a difference but the study did not find it.}Selection bias {Ans: A focus on effects rather than causes, which can lead to inaccurate conclusions about correlation or causation}When are cohort studies preferable {Ans: to investigate the causes of disease and to establish links between risk factors and health outcomes.}Selection Response Bias {Ans: A bias is introduced by the selection of individuals or groups in a way that one given group is more likely to get selected