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- Topic: degrees of freedom

Author | Topic: degrees of freedom |
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DJScratch@2009-11-02 23:36:00 |
I'm having trouble learning degrees of freedom. And this seems to be a part of all of the level II tests.
It is related to the number of observations? From the number of observations, I think you subtract one plus the number of variables in the regression equation. Is this correct? Don't miss this question on the test!!!! Past history (the last 3 years) shows it WILL be on the test. For example: People who pass the test = 50 + .7(hours studied) + .6(mba)+.1(luck) Let's say the number of observations is 20 The degrees of freedom would be 20-3-1. Is this correct? (I think so.) |

ahoe@2010-04-02 05:31:00 |
There are two method of calculating the degree of freedom for a regression model. First method use n - d - 1, where the n represents number of observation and d represents number of independent variables in the model. Second method use n - d, where the n still represents number of observation and the d, however, represents number of variable (independent variable + constant) in the right hand side of the equation. Both method will come out with the same degree of freedom. |