Describe the difference between dependence, strength of association and causation?? Do not simply define each. Rather describe the differences and how the concepts are related.
Select a nominal (dichotomous) variables to test whether there is a difference between the mean of the 2 samples. Write out all five steps. This is a great opportunity to be creative-e.g. does the mean income differ between people who watch television (or drink soda, or listen to NPR or…..etc. etc. ) and those who do not? Be sure to check the coding of the variable and to run the frequencies to ensure that the variable really is interval, nominal, etc. . You may need to recode.
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