fixed p-value computation in test of coefficients

[pspp-builds.git] / src / language / stats / regression.q

diff --git a/src/language/stats/regression.q b/src/language/stats/regression.q
index a5851ff34e4857b2ee086ee8a630ffb9de7091c9..287847a855452d3fba03ce7f1f6cb22405556c6d 100644 (file)
--- 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"));