Part 2
For the following scenario perform the best statistical analysis that you can in R to test the hypothesis. Include your null and alternate hypotheses, your test statistic, the degrees of freedom and P value, a conclusion with regards to your statistical hypotheses, and an overall (biological) conclusion.
A biologist is studying a lineage of fish that recently (in evolutionary time) dispersed from
its ancestral marine habitat to freshwater lakes and rivers. The biologist hypothesized that
diversification would happen more rapidly in lakes than rivers due to the greater variation
in habitat within lakes. To test this, she counted the number of descendant species in the
lakes and rivers colonized by the ancestral lineage and found 42 species in the lakes and 18
species in the rivers. Note that there were twice as many lakes as rivers.
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