<div dir="ltr"><div>If you have calculated the Z-scores, then you must have the *population* means and standard deviations at each grid point,<br><br><a href="http://www.ncl.ucar.edu/Document/Functions/Built-in/cdfnor_p.shtml">http://www.ncl.ucar.edu/Document/Functions/Built-in/cdfnor_p.shtml</a><br><br>x         = -1.64485<br>mean  = 0.0<br>sd       = 1.0<br> <br>P = cdfnor_p(x,mean,sd)<br>print(&quot;P=&quot;+P) <br><br>====<br></div><div>An alternative function is the student-t function. For large &#39;n&#39; (say, n&gt;25) the student-t is the Z-score<br></div><br><a href="http://www.ncl.ucar.edu/Document/Functions/Built-in/student_t.shtml">http://www.ncl.ucar.edu/Document/Functions/Built-in/student_t.shtml</a><br><div><br><br></div><div> t  = -2.12                                 <br></div><div> P  = student_t(t, df)   ; P = 0.05   <br> print(P)  <br><br></div><div>In the unlikely event that you have a Z-score but no idea about size use:<br><br></div><div>P = student_t(z, 100)<br></div><div><br>=============<br></div><div>Please examine:<br><br><a href="http://www.ncl.ucar.edu/Document/Functions/cumul_dist.shtml">http://www.ncl.ucar.edu/Document/Functions/cumul_dist.shtml</a><br><a href="http://www.ncl.ucar.edu/Document/Functions/statistics.shtml">http://www.ncl.ucar.edu/Document/Functions/statistics.shtml</a><br><br><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Nov 21, 2016 at 7:28 AM, Seshagirirao Kolusu <span dir="ltr">&lt;<a href="mailto:seshukolusu@gmail.com" target="_blank">seshukolusu@gmail.com</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Dear all,<div>I am new to NCL. I have negative Z-score values at each grid point but I wanted to convert Z to  the probability values (see: <a href="http://www.had2know.com/academics/normal-distribution-table-z-scores.html" target="_blank">http://www.had2know.com/<wbr>academics/normal-distribution-<wbr>table-z-scores.html</a>). Could you please guide me how to convert them? </div><div><br></div><div>Thanks,</div><div>Seshu</div><span class="HOEnZb"><font color="#888888"><div><br></div><div><br clear="all"><div><br></div>-- <br><div class="m_5208395528115582721gmail_signature"><div dir="ltr">******************************<wbr>**********************<br>Dr.rer.nat. K.Seshagirirao<br>PDRA<br><a href="http://www.see.leeds.ac.uk/research/icas/" target="_blank">Institute for Climate and Atmospheric Science (ICAS)</a>, <br>
<a href="http://www.see.leeds.ac.uk/" target="_blank">  School of Earth and Environment (SEE)</a>,<br>
<a href="http://www.leeds.ac.uk/" target="_blank">University of Leeds</a>,    <br>
Leeds,                   <br>
LS2 9JT;UK<br><a href="http://www.see.leeds.ac.uk/people/s.kolusu" target="_blank">http://www.see.leeds.ac.uk/<wbr>people/s.kolusu</a> <br>******************************<wbr>**********************</div></div>
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