BMS1042 Lecture Notes - Lecture 8: Linear Regression, Categorical Variable, Logistic Regression
21 Jan 2020
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Outbreak same as an epidemic (may be smaller number of cases, area, or population) Outbreaks usually occur because of one of three reasons. Primary goals of an outbreak investigation: (all of the following must be done in a timely manner) Identify pathogen or source: control (stop new cases, prevent future outbreaks. Secondary goals: learn more about the disease, training opportunity. Factors that impact progress and decision making: case numbers, disease severity, risk to others, public/political/legal concerns. For any type of regression, the dependent variable is the main determinant of what type of analysis we must do. Linear regression is used to find the exact value - for example, finding the exact value of someone"s bmi. Null hypothesis: the beta coefficient (the slope) is 0. Test to evaluate a linear regression: r^2 test. Logistic regression is used to find a yes or no outcome - for example, whether someone is obese or not.
