Several visualizion modules have been created to help students to visualize how the common statistical analysis methods are used in practicing medicine.
An example showing how the power of a two-sample test depends on the null cutoff and sample sizes.
Webpage: Simple Power Calculation for Two-Sample Z Test
These are example programs to randomly draw from a population of some positive and some negative for a condition, apply an imperfect screening test, and look at the accumulation of true and false positives and negatives. The webpages have little sliders to adjust where the diagnostic cutoff line was set for the test and what the population prevalence for the condition was.
Webpages:
The contents were created in collaboration with Professor Ellen Fireman (Deptartment of Statistics) and Professor Michael Weissman (Department of Physics) at the University of Illinois at Urbana-Champaign.