Then they used regression analysis to see if being in a possession of a gun made you more likely to be shot when compared to a control group of random Philadelphia residents.

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Even a regression with lots of controls, even propensity score analysis, is insufficient in this area of study.

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As the regression analysis in Table 2 demonstrated, a rising sense of free choice is by far the most powerful factor driving rising SWB.

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But, as John Yinger, of Syracuse University, points out in the JEP symposium, regression analysis has drawbacks as a tool for measuring discrimination.

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When plotted in a regression analysis the change in average mTTV explains 73.4% of the variation in change in average finish position (see graph below).

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