I have 5 categories rock samples and I am trying to understand how their fossil preservation differs and whether the difference is statistically significant. I determined the presence or absence of fossils using a spectroscopy tool in rocks representing 5 sample categories. I obtained the percentage of positive occurrences. I then repeated the measurement 10 times in each category and obtained a mean percentage for each category.
- What test do I use to understand (1) if and (2) how the means of the 5 categories are statistically different from each other?
- Can I then rank the categories in their preservation potential to contain fossils?
- Is repeating the test 10 times per category enough?