Biostatistics Review: Just name the statistical test that would be used to answer each question

I need support with this Statistics question so I can learn better.

We were given an assignment with a lot of data in an excel file (some categorical variables, some continuous variables). I know how to do all of the statistical tests and analysis that we learned in class, but I am really struggling with knowing what test to use, in what scenario. We are supposed to answer the following questions. For each, ALL that I need is the name of the statistical test that would be able to answer it. I’ll do all of the actual analysis myself.
That’s all! Please see the attached word document for more details. Thanks!

Do the species differ in average weight and average head width?
Are the size classes for each species representative of differences in average weight and average head width?
Do the species differ with respect to the frequency distribution of size classes?
Is weight a good predictor of head width for each species, and if so does this relationship vary among size classes for each species?
Is there an association between ant size and distance from the colony for each species (e.g., do larger ants stay closer to the colony)?

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