\sigma^2 &=& {\rm E}[R_i^2] - \mu^2 \\
{\rm E}[R_i^2] &=& \sigma^2 + \mu^2
Embed the image to your blog in HTML, Markdown, Textile, BBCode.
Recent Referers:
  1. http://formula.s21g.com/?%5Csigma%5E2%20%26%3D%26%20%7B%5...
  2. https://www.google.com/
  3. http://mglab.blogspot.com/2010_05_01_archive.html?m=1
  4. http://mglab.blogspot.com/search/label/%E9%87%91%E8%9E%8D...
  5. http://mglab.blogspot.com/search/label/%E9%87%91%E8%9E%8D...