<br><br><div class="gmail_quote">On Tue, Sep 7, 2010 at 3:23 PM, David Flay <<a href="mailto:flay@jlab.org">flay@jlab.org</a>> wrote:<blockquote class="gmail_quote">
<div class="gmail_quote"><div><br>
Now, we determine N_eff --- we see what percentage of events survive all cuts, as compared to the original number of events:<br><br>N_eff = (N_cut/N_p)*(N_p/N_raw)*N_T = (N_cut/N_raw)*N_T </div></div></blockquote><div><br>
</div><div>Just realized I didn't finish the calculation: </div><div><br></div><div>N_eff = (N_cut/N_raw)*N_T = (4372/4681052)* 214350416 = 200199. </div>
<div> </div><blockquote class="gmail_quote"><div class="gmail_quote"><div> Please see the corrected note (corrected errors at 4-pass):<br><br><a href="http://www.jlab.org/%7Eflay/thesis/A1_error/A1_stat_error_note_v2.pdf">http://www.jlab.org/~flay/thesis/A1_error/A1_stat_error_note_v2.pdf</a></div>
</div></blockquote><div><br></div><div> </div></div><br><br clear="all"><br>-- <br>-----------------------------------------------------------<br>David Flay<br>Physics Department<br>Temple University<br>Philadelphia, PA 19122 <br>
<br>office: Barton Hall, BA319<br>phone: (215) 204-1331<br><br>e-mail: <a href="mailto:flay@jlab.org">flay@jlab.org</a> <br> <a href="mailto:flay@temple.edu">flay@temple.edu</a><br>
<br>website: <a href="http://www.jlab.org/~flay">http://www.jlab.org/~flay</a><br> <a href="http://quarks.temple.edu">http://quarks.temple.edu</a><br>-----------------------------------------------------------<br>
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