atualizada ha&#39; 2 dias: <a href="http://www.burns-stat.com/pages/Tutor/R_inferno.pdf">http://www.burns-stat.com/pages/Tutor/R_inferno.pdf</a><div><br></div><div>b<br clear="all"><br>-- <br>Successful people ask better questions, and as a result, they get better answers. (Tony Robbins)<br>


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