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| APPENDIX. D: T-TEST STATISTICS |
Editorial Notes:
The tables below and the tables in chapter 4 were produced using two different tool sets (software). Because of this, the appearance (style) of the tables here is different from those in chapter 4.
For those interested in details, the tables here were prepared using the SAS® System, specifically the Output Display System of the base SAS software product. A standard style sheet provided in SAS was used (with some minor modifications). The tables utilize cascading style sheets and JavaScript. Your browser must support these features in order to display the tables correctly. Also, depending on your browser, the fonts that appear in these appendices may be different from the fonts in the other parts of the thesis.
Check before you start reading the tables:
Readers are advised that this appendix is intended primarily for those who can interpret the results of a basic statistical analysis. If you are unfamiliar with statistics, or uncomfortable with it, we gently suggest that you might not find these appendices to be relevant to you.
Note: SAS® is a registered trademark of SAS Institute Inc., Cary, North Carolina [U.S.].
Statistical Notes: Help in Interpreting the Tables
This appendix provides the results of all the t-tests done for the thesis, including both significant and non-significant results. The output below is labeled; in the tables, the columns have the following meanings.
N = sample size for test.
t Value = t-statistic for test.
Mean, Std Error = mean, standard error of paired difference for t-test; used in computing the t-statistic. Here the paired differences = (post-test) - (pre-test).
Pr > |t| = significance level for test. Values below 0.05 are regarded as statistically significant, per convention.
If you have difficulty understanding these tables, please consult an elementary statistics text for clarification. Please note that Beyond Veg authors/editors cannot provide statistical tutoring via email.
| Nutrition Education Initiative |
| Indiana State University, 1996-1997 |
| Paired-Comparisons t-test: by Class Year |
| (Chapter 4, table 1) |
| The MEANS Procedure |
| Year of Residency (1-3)=Year 1 |
| Analysis Variable : diffscr Difference in Scores: PostTest-PreTest |
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| N | Mean | Std Error | t Value | Pr > |t| |
| 5 | 5.4000000 | 2.8035692 | 1.93 | 0.1264 |
| Year of Residency (1-3)=Year 2 |
| Analysis Variable : diffscr Difference in Scores: PostTest-PreTest |
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| N | Mean | Std Error | t Value | Pr > |t| |
| 5 | 3.0000000 | 0.8366600 | 3.59 | 0.0231 |
| Year of Residency (1-3)=Year 3 |
| Analysis Variable : diffscr Difference in Scores: PostTest-PreTest |
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| N | Mean | Std Error | t Value | Pr > |t| |
| 5 | 2.0000000 | 1.0000000 | 2.00 | 0.1161 |
| Nutrition Education Initiative |
| Indiana State University, 1996-1997 |
| Paired-Comparisons t-test: All Students Pooled |
| The MEANS Procedure |
| Analysis Variable : diffscr Difference in Scores: PostTest-PreTest |
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| N | Mean | Std Error | t Value | Pr > |t| |
| 15 | 3.4666667 | 1.0275568 | 3.37 | 0.0045 |