(solution) What is the standard deviation of winning percents? What

(solution) What is the standard deviation of winning percents? What

What is the standard deviation of winning percents?  What advantage is there to using the standard deviation of winning percent, divided by the hypothetical standard deviation from a balance league, rather than just the standard deviation of winning percent alone?  

I attached the file where you find a material for this task! Please read it. 

Adjusting Winning-Percentage Standard Deviations and
a Measure of Competitive Balance for Home Advantage Gregory A. Trandel
Department of Economics
University of Georgia
Joel Maxcy*
Department of…