I'm working with quite a small data and I previously used ANOVA and Tukey as post-hoc test when I had more data years before. Now, I actually forgot how to use SPSS but I have to use it for an old paper (but I can also use R). My data have 4 Categories with 5 levels each except for the last category with just 2 levels. For each level, I have one numerical value (average of 3 raw data).
Sample data:
| Categories | Levels | Values |
|---|---|---|
| pH | 2 | .023 |
| pH | 3 | .032 |
| pH | 4 | .031 |
| pH | 5 | .000 |
| pH | 6 | .018 |
| Moisture | 10 | .032 |
| Moisture | 15 | .300 |
| Moisture | 20 | .185 |
| Moisture | 25 | .281 |
| Moisture | 30 | .100 |
| Light | With | .910 |
| Light | Without | .213 |
These are just sample data (I have 2 more categories). Are ANOVA and Tukey still applicable to my data? And how should I do this via SPSS or R?
I would appreciate any help with this.