From: Jason Stover <jhs@math.gcsu.edu>
Date: Sun, 4 Feb 2007 16:38:26 +0000 (+0000)
Subject: fixed p-value computation in test of coefficients
X-Git-Tag: v0.6.0~568
X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?p=pspp-builds.git;a=commitdiff_plain;h=3b76a8aa4e808b2e6bdb792c369fda72a61304de

fixed p-value computation in test of coefficients
---

diff --git a/src/language/stats/ChangeLog b/src/language/stats/ChangeLog
index 712c8428..ef085bf7 100644
--- a/src/language/stats/ChangeLog
+++ b/src/language/stats/ChangeLog
@@ -1,3 +1,8 @@
+2007-02-04  Jason Stover  <jhs@math.gcsu.edu>
+
+	* regression.q: Fixed p-value computation in the test for
+	individual regression coefficients.
+
 Mon Jan 15 11:03:20 2007  Ben Pfaff  <blp@gnu.org>
 
 	Fix bugs found by valgrind when --enable-debug is used with the
diff --git a/src/language/stats/regression.q b/src/language/stats/regression.q
index a5851ff3..287847a8 100644
--- a/src/language/stats/regression.q
+++ b/src/language/stats/regression.q
@@ -269,7 +269,7 @@ reg_stats_coeff (pspp_linreg_cache * c)
       /*
          P values for the test statistic above.
        */
-      pval = 2 * gsl_cdf_tdist_Q (fabs (t_stat), 1.0);
+      pval = 2 * gsl_cdf_tdist_Q (fabs (t_stat), (double) (c->n_obs - c->n_coeffs));
       tab_float (t, 6, j + 1, 0, pval, 10, 2);
     }
   tab_title (t, _("Coefficients"));