Today, we will start by interpreting the line graphs that we all created yesterday.  Next, I want to reinforce the concept  of expected frequencies, and the use a chi-square test which compares expected with actual frequencies.  For this, we will use this data on birthdays from 1980 to 1994 from a life insurance company.

Finally, we will return to the baseball data.  This time, we will work on baseball salaries. 



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    Jacob Felson received his doctorate in sociology from Penn State University in December, 2009. He received a master's in sociology from Penn State in 2004, and a bachelor's degree, also in sociology, from the University of Chicago in 2002

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