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Re: bug in Runs p-value

From: Ben Pfaff
Subject: Re: bug in Runs p-value
Date: Sat, 13 Sep 2014 09:30:37 -0700
User-agent: Mutt/1.5.21 (2010-09-15)

On Sat, Sep 13, 2014 at 07:53:37AM -0700, Douglas Bonett wrote:
> The p-value reported in the Runs procedure is not computed correctly. The
> z-value appears correct.  The error is easy to find with almost any data.
> In my case, z = 1.26 and the reported p was 1.794 (it should be .206).
> Note that 2 - 1.794 = .206.
> This should be a simple fix.

Thanks for the report.

RUNS has few test cases in the PSPP source tree.  Do you have a small
test case to contribute (with syntax, data, and expected output)?  Then
I would feel much more confident about the fix.

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