Archives


Seminar Slides: The Bayesian Approach to Data Analysis | Fridtjof Thomas

|

Please see below the slides from the seminar on May 15th, 2019 by Fridtjof Thomas.   Seminar Slides Bayesian Approach to Data Analysis

Seminar Slides: P-Value Discussion | Dr. Saunak Sen

|

Please see below for the sides from Dr. Sen’s seminar discussion. p-value-discussion  

P-values – What they are and what they are not – Seminar Presentation Slides – Fridtjof Thomas

|

P-values: What they are and what they are not, will look in detail at good examples of using p-values and how to interpret them. After reviewing widely understood problems with p-values, attention is drawn to regularly encountered use of p-values where it is less clear what their correct interpretation actually is. Furthermore, we demonstrate why… Read More

Anatomy of a Diagnostic Test – an R Shiny Example by Saunak Sen

|

The positive and negative predictive values of a dignostic test depend not only on its sensitivity and specificity, but also the prevalence of the disease (or the pre-test probability of disease).  This interactive display illustrates that inter-dependence. Move the sensitivity, specificity, and disease prevalence sliders, and watch the positive and negative predictive value sliders change… Read More

Equivalent of SAS Macros in R – Loops and Functions by Courtney Gale

|

If you’re an avid SAS user, you’re likely very familiar with SAS macros. SAS macros are a key component to creating efficient and concise code. Although you cannot use macros in R, R offers other features like functions and loops that can perform the same tasks as SAS macros. Using apply() to loop over variables… Read More