Experiments & Observational Studies
J. Lind, 1753
Experimenting vs. Observing
Terms
Reader’s Guide
Medical Experiments
An Experimental Design
Why Randomize?
Random Sampling is not Randomized Assignment
Was Not Randomized
Vitamin C for Cancer
Linus Pauling 1975:
Mayo Clinic: “Wrong!”
What Went Wrong
Well, duh!
Who knew what when?
Why Blindfold Patient?
Why Blindfold Investigator?
PPT Slide
The main purpose of blindfolding,
Email: george-woodworth@uiowa.edu
Home Page: http://www.stat.uiowa.edu/~gwoodwor