http://www.msnbc.com/morning-joe/watch/ ... 9275843593" onclick="window.open(this.href);return false;
Wait a while and you'll see the video and the Rattner chart thing starts about 45 seconds in. I reproduced the last two charts at the bottom of this post. The problem with the second chart that shows a correlation between gun ownership rate and gun homicide rate it that he cherry picked a handful of countries. Take a look at the table at http://www.washingtonpost.com/wp-srv/sp ... hip/table/" onclick="window.open(this.href);return false; . It's a gun homicide rate table so not quite the same as gun deaths. But if I just use the data in the table from the eight countries Rattner used in the video I get a highly significant correlation between gun ownership rate and gun homicides. 99.6% confidence level. Consistent with the point he was trying to make.
HOWEVER, if I don't cherry pick and just use data in the table for all 107 countries for which the necessary data are available, I do not get a significant correlation. Also, the correlation coefficient is negative. That means that to the extent that one should lean one way or the other one would lean towards thinking gun homicide rates tend to go DOWN as gun ownership goes UP. You could be about 70 percent confident that's the case.
And if you do some math and look at the TOTAL homicide rate you get a negative correlation that gives you about 84 percent confidence that homicides tend to go DOWN when gun ownership rates go UP.
The other chart is bad because he acted like it showed something and it doesn't. It just shows a downward trend from the beginnning of the period depicted. If all the bars were of one color you could not tell when the law he referenced was passed. There's no obvious change in the downward trend.











