Iraq War Ends
On August 31, 2010 President Obama marked the end of Operation Iraqi Freedom. Mitch Stewart, Director of Organizing for America, provided a link to a video of the President's address, with a brief introduction:
For a number of reasons, this is an important, symbolic moment. The GCP watched the buildup, the protests, and beginning of this war long years ago. And we have watched the network response during prominent moments in Barack Obama's campaign and his Presidency. This speech represents both the long desired end of the war and another instance of Obama in the public eye. The GCP event was set for 2 hours beginning approximately 30 minutes before the speech (scheduled for 8pm, but I don't have the exact time) and continuing an hour or more after the speech. The result is Chisquare 7313.687 on 7200 df, for p = 0.172 and Z = 0.948. The graph shows the approximate time of the speech.
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.