Go to YouTube and search for: we were there Polio. You should see a video put out by the CDC. About 60 minutes into the presentation you'll find a table of data from the 1954 clinical trial of in activated polio vaccine. Use the data to estimate the placebo affect in the study by estimating the relative risk of paralysis(placebo versus not included) rounding of your final answer( but not the intermediate numerator and denominator computations) to the nearest hundredth