Congresswoman Giffords Target of Shooting

TUCSON, Ariz. (AP)

A gunman nearly unloaded a semiautomatic weapon at a busy supermarket Saturday during a public gathering for Rep. Gabrielle Giffords, wounding the Democrat and killing Arizona's chief federal judge and five others in an attempted assassination that left Americans questioning whether divisive politics had pushed the suspect over the edge.

The shooting targeted Giffords and left the three-term congresswoman in critical condition after a bullet passed through her head. A shaken President Barack Obama called the attack "a tragedy for our entire country."

Giffords, 40, is a moderate Democrat who narrowly won re-election in November against a tea party candidate who sought to throw her from office over her support of the health care law. Anger over her position became violent at times, with her Tucson office vandalized after the House passed the overhaul last March and someone showing up at a recent gathering with a weapon.

Police say the shooter was in custody, and was identified by people familiar with the investigation as Jared Loughner, 22. U.S. officials who provided his name to the AP spoke on condition of anonymity because they were not authorized to release it publicly.

The GCP event was set for 6 hours beginning at 10:00 am local time in Arizona. The result is Chisquare 21730.969 on 21600 df, for p = 0.264 and Z = 0.632.

Giffords Target

It is important to keep in mind that we have only a tiny statistical effect, so that it is always hard to distinguish signal from noise. This means that every "success" might be largely driven by chance, and every "null" might include a real signal overwhelmed by noise. In the long run, a real effect can be identified only by patiently accumulating replications of similar analyses.

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