3 public health questions | English homework help

Minimum 200 words each…3 questions total…please be thorough  

Q1 Suppose you are conducting a critique of scientific literature. Define multivariable analysis, and explain why this method is important to epidemiologic research as it pertains to bias and to Hill’s guidelines for association and causation?

Q2 when critiquing an epidemiological study, explain why it is important to know what type of study was conducted and how bias and confounding are evaluate?

Q3 In your own words, briefly explain how descriptive, interventional, and observational studies in public health research differ.  as a practicing epidemiologist, summarize how you would collect data if you were conducting a case-study that examines single disease in relation to exposure to more than one agent.  How would your data collection methods differ if you were conducting an ecological study?