Welcome to Data Analysis Resource With Interactive Navigation
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![Is there a difference?](http://my.ilstu.edu/~oakman/dataanalysis/_derived/difference.htm_cmp_copy-of-blank010_hbtn.gif)
![Is there association?](http://my.ilstu.edu/~oakman/dataanalysis/_derived/association.htm_cmp_copy-of-blank010_hbtn.gif)
![Independent Variables](http://my.ilstu.edu/~oakman/dataanalysis/_derived/independent_variables.htm_cmp_copy-of-blank010_hbtn_p.gif)
When working with more than one independent variables, the first classification is the scale of the independent variables. Since more than one variable is involved, they may not be on the same scale.
![Nominal](http://my.ilstu.edu/~oakman/dataanalysis/_derived/nominal_independent_variable.htm_cmp_copy-of-blank010_hbtn.gif)
![Nominal and Numerical](http://my.ilstu.edu/~oakman/dataanalysis/_derived/new_page_12.htm_cmp_copy-of-blank010_hbtn.gif)
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