X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Flanguage%2Fstats%2Ft-test.q;h=8f23cefd4afa54c8be6cfebe7031128a913e3616;hb=refs%2Ftags%2Flenny-x64-build53;hp=d25477cdd153f27a55b8170f89bdf75e6020b75a;hpb=734bcddfcfbb6f802aa0975a8423b3be5b874ca6;p=pspp-builds.git

diff --git a/src/language/stats/t-test.q b/src/language/stats/t-test.q
index d25477cd..8f23cefd 100644
--- a/src/language/stats/t-test.q
+++ b/src/language/stats/t-test.q
@@ -43,10 +43,12 @@
 #include <libpspp/taint.h>
 #include <math/group-proc.h>
 #include <math/levene.h>
+#include <math/correlation.h>
 #include <output/manager.h>
 #include <output/table.h>
 #include <data/format.h>
 
+#include "minmax.h"
 #include "xalloc.h"
 #include "xmemdup0.h"
 
@@ -1109,10 +1111,6 @@ pscbox (struct t_test_proc *proc)
   for (i = 0; i < proc->n_pairs; i++)
     {
       struct pair *pair = &proc->pairs[i];
-      double p, q;
-      double df = pair->n -2;
-      double correlation_t = (pair->correlation * sqrt (df) /
-                              sqrt (1 - pow2 (pair->correlation)));
 
       /* row headings */
       tab_text_format (table, 0, i + 1, TAB_LEFT | TAT_TITLE,
@@ -1126,10 +1124,8 @@ pscbox (struct t_test_proc *proc)
       tab_double (table, 2, i + 1, TAB_RIGHT, pair->n, &proc->weight_format);
       tab_double (table, 3, i + 1, TAB_RIGHT, pair->correlation, NULL);
 
-      p = gsl_cdf_tdist_P (correlation_t, df);
-      q = gsl_cdf_tdist_Q (correlation_t, df);
-      tab_double (table, 4, i + 1, TAB_RIGHT,
-                 2.0 * (correlation_t > 0 ? q : p), NULL);
+      tab_double (table, 4, i + 1, TAB_RIGHT, 
+		  2.0 * significance_of_correlation (pair->correlation, pair->n), NULL);
     }
 
   tab_submit (table);