st: RE: ANOVA with tabulated data

[David Airey <david.airey@Vanderbilt.Edu>]

> I have student's score data, in rows by students and in columns by
> exams.
> How to set ANOVA command to make two-factor (by students and by  
> exams) ANOVA test?
>
> Data example:
>
> .list
> +-------------------------------+
> | Exam1 Exam2 Exam3 Exam4 |
> |-------------------------------|
> 1. | 75 78 80 73 |
> 2. | 73 71 69 67 |
> 3. | 60 64 62 63 |
> 4. | 70 72 70 80 |
> 5. | 86 90 85 92 |
> +-------------------------------+
Keep in mind, that if rows are subjects, then each subject has been  
measured multiple times, and more than twice. So although you have a  
2 factor anova, it will typically be called a one way repeated  
measures ANOVA, and you will need to specify a repeated variable, in  
your case exams. Just follow the person drug example at

http://www.stata.com/support/faqs/stat/anova2.html

-Dave
*
*   For searches and help try:
*   http://www.stata.com/support/faqs/res/findit.html
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/