BIOS 1500 Lecture Notes - Lecture 2: Byssinosis, Viral Disease, Random Assignment
Document Summary
This presentation covers material found in chapters 7 and 8. Applications professional practice or day to day operations indicate a need or suggest a better way. The purpose of a research endeavor is often stated in one or more specific aims and sub- aims of a (cid:494)research(cid:495) proposal. The most important aspect is to be as specific and clear as possible about the purpose. All other components of the design will be referred back to the purpose. Remember the frequentist approach of specifying all aspects of the analysis prior to collecting the data. A variable is any characteristic of the items or individuals in the population which varies among the individuals. Weight, height, religious affiliation, favorite food, or level of immune response, etc. Variables have a typology which relates to their characteristics. For example length can take on almost any value greater than zero, and is referred to as continuous.
