Yes, as I looked at the graph they lumped the lower scores under 1200 as if there would be minimal discrimination there.
I agree about the skew and therefore suspect we have non representative student and faculty samples. On the other hand, how many schools realistically have enough students to allow conclusions at the upper ends? Annette Sent from my Verizon Wireless smartphone Michael Palij wrote: On Wed, 11 Jan 2012 07:10:23 -0800, Annette Taylor wrote: >I'm a bit distracted and may not have read all of the posts very closely but I >note that at least the blog post BEGINS with an SAT of 1200 on a 1600 point >scale. (I have not taken the time to read the article) I'm note completely sure I know what you're referring to but if you are talking about the x-axis for the figure in the blog (Figure 2 in the article), the lowest value is 400-1200. In the article the authors write: |The regression results imply that a student with a (hypothetical) SAT |score of 0 can expect a 1.19 units lower grade from a Republican |professor than from a Democratic one, while for a student with a SAT |score of 700 (the lowest score in the sample) the difference is 0.54 grade |units. In contrast, a student with a perfect SAT score of 1,600 can expect |a 0.30 units higher grade from a Republican professor than from a |Democratic one. So, their lowest SAT total score was 700. Their mean SAT score was 1359 with SD= 116 (see Table 2).which make a score of 700 an outlier (z= -5.68). I haven't looked at the raw data but I assume that the SAT score distribution is negatively skewed. -Mike Palij New York University [email protected] --- You are currently subscribed to tips as: [email protected]. To unsubscribe click here: http://fsulist.frostburg.edu/u?id=13534.4204dc3a11678c6b1d0be57cfe0a21b0&n=T&l=tips&o=15235 or send a blank email to leave-15235-13534.4204dc3a11678c6b1d0be57cfe0a2...@fsulist.frostburg.edu --- You are currently subscribed to tips as: [email protected]. To unsubscribe click here: http://fsulist.frostburg.edu/u?id=13090.68da6e6e5325aa33287ff385b70df5d5&n=T&l=tips&o=15239 or send a blank email to leave-15239-13090.68da6e6e5325aa33287ff385b70df...@fsulist.frostburg.edu
