References

Anderson, D. R., Sweeney, D. J., & Williams, T. A. (2011). Statistics for business and economics. South-Western College Publisher.

Anderson, D. R., Sweeney, D. J., & Williams, T. A. (2010). Statistics for business and economics. South-Western College Publisher.

Bureau of Economic Analysis, GDP and Personal Income: SA1-3 Personal Income Summary.

Bureau of Economic Analysis, National Income and Product Account Tables: Table 2.3.5-Personal Consumption Expenditures by Major Type of Product.

Gosset, W. S. (1908). Probable error of a correlation coefficient. Biometrika 6, 302–310.

Internal Revenue Service. (2009). SOI Tax Stats—Tax Stats at a Glance. Summary of Collections Before Refunds by Type of Return, FY 2009 [1]. http://www.irs.gov/taxstats/article/0,,id=102886,00.html ...

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