Chapter 1 the study of collocations

Table 19.  Post-hoc comparisons for the dependent variable: Error-Free T-
Units 
Comparison 
Mean Diff. 
Fisher PLSD  Scheffe F-test  Dunnett t 
Group 1 vs. Group 2  -.095 
2.09 
.004 
.09 
Group 1 vs. Group 3  3.892 
2.112* 
6.581* 
3.628 
 
241

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Group 2 vs. Group 3  3.988 
2.096* 
7.019* 
3.747 
* Significant at .05 level 
 
Table 20.  Means and standard deviations for the dependent variable: Error-
Free T-Units 
GROUP COUNT MEAN STD. 
DEV. 
Group 1 
91 
9.681 
6.993 
Group 2 
94 
9.777 
8.662 
Group 3 
90 
5.789 
5.596 
4.1.8  S-Nodes per T-Unit 
 
The ANOVA for the dependent variable S-Nodes per T-Unit shows a 
significant main effect for the factor Group (F(2, 272) = 89.607, p = .0001).  To 
examine the source of the significant effect for the factor Group, post-hoc 
comparisons of the means for each group were performed.  The results of the 
comparisons are illustrated in Table 21.  There is a significant difference 
between all groups at the p < .05 level of significance.  There is a steady increase 
in the number of S-Nodes per T-Unit from Group 1 to Group 3, see Table 22.