Which statistical method fits?

Start with the question and the observations. A test name comes later.

Two adults use fieldwork instruments on a rocky shore.
Fictional fieldwork illustration
This chooser is general methods training. It does not design an assessed investigation or decide an analysis for your NEA. Follow your teacher’s and awarding body’s rules.

Interpretation still needs geography

Sampling, scale, missing data and measurement choices affect what a result can mean. Check independence, assumptions and whether your qualification specifies a method or convention.

Spearman rank · Chi-square · Mann–Whitney U · t-test