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I'm looking for critical values for Wilcoxon Signed Rank for larger values of N but can only find tables and lists for up to N=40. I am looking for either comprehensive sources of critical values for a much larger range of N, or a way to calculate these critical values myself for any given value of N and different levels of significance.

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  • $\begingroup$ Have you tried dwilcox in R ? $\endgroup$ Mar 31, 2016 at 10:16
  • $\begingroup$ I don't use R myself but my partner does. I'll have a look. $\endgroup$
    – Serafina
    Mar 31, 2016 at 10:41
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    $\begingroup$ Above that point you should usually be able to use the normal approximation $\endgroup$
    – Glen_b
    Mar 31, 2016 at 13:09
  • $\begingroup$ @Glen_b I did find a formula for the normal approximation, but I don't know how to use or adjust it for different levels of significance, i.e. .05, .01,.001. $\endgroup$
    – Serafina
    Mar 31, 2016 at 13:37
  • $\begingroup$ Perhaps that's the question you ought to be asking. It certainly has a simpler answer than the one you asked. The Wikipedia article on this test contains a brief explanation of how to use the Normal approximation (aka "z score"). Any elementary statistics textbook published in the last 150 years or so will provide detailed instructions--that gives you a great many accessible resources to refer to! $\endgroup$
    – whuber
    Mar 31, 2016 at 14:41

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