ex1220

The number of species on an island is known to be related to the
  island's area.  Of interest is what other variables are also related
  to the number of species, after island area is accounted for, and
  whether the answer differs for native and non native species.

datasets

Data sets from Ramsey, F.L. and Schafer, D.W. (2013), "The
    Statistical Sleuth: A Course in Methods of Data Analysis (3rd
    ed)", Cengage Learning. 

Berwin Turlach

Sleuth3

Data Sets from Ramsey and Schafer's "Statistical Sleuth (3rd
        Ed)"

ex1220 function

Ramsey, F.L. and Schafer, D.W. (2013). <em>The Statistical Sleuth: A
    Course in Methods of Data Analysis (3rd ed)</em>, Cengage Learning.

ex1220: Galapagos Islands

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